List of Hawaii Five-0 (2010 TV series) episodes

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Hawaii Five-0 is a police procedural series developed for television by Alex Kurtzman, Roberto Orci, and Peter M. Lenkov, based on the 1968 series of the same name created by Leonard Freeman. It premiered on CBS on Monday, September 20, 2010, 42 years to the day from the premiere of the original show, September 20, 1968. The title of each episode (except the pilot and the season 3 episode "Hookman") is in Hawaiian rather than English.

The series covers the actions of a small special state task force created by the Governor of Hawaii, Pat Jameson, to investigate serious crimes throughout the Islands, as Hawaii does not have a conventional state police force. The team is headed by Lieutenant Commander Steve McGarrett, USNR (and former Navy SEAL) as it investigates crimes ranging from terrorism to kidnapping. McGarrett chooses as his partner Honolulu PD (and former Newark PD) Detective Danny Williams, and together McGarrett and Williams lead a team that includes Capt. Lou Grover, Adam Noshimuri, Quinn Liu, Junior Reigns and Tani Rey.

During the course of the series, 240 episodes of Hawaii Five-0 aired over 10 seasons, between September 20, 2010, and April 3, 2020.

Series overview

Season		Episodes	Originally aired
			First aired	Last aired	Rank	Rating	Average viewership (in millions)
	1	24	September 20, 2010 (2010-09-20)	May 16, 2011 (2011-05-16)
	2	23	September 19, 2011 (2011-09-19)	May 14, 2012 (2012-05-14)
	3	24	September 24, 2012 (2012-09-24)	May 20, 2013 (2013-05-20)
	4	22	September 27, 2013 (2013-09-27)	May 9, 2014 (2014-05-09)
	5	25	September 26, 2014 (2014-09-26)	May 8, 2015 (2015-05-08)
	6	25	September 25, 2015 (2015-09-25)	May 13, 2016 (2016-05-13)
	7	25	September 23, 2016 (2016-09-23)	May 12, 2017 (2017-05-12)
	8	25	September 29, 2017 (2017-09-29)	May 18, 2018 (2018-05-18)
	9	25	September 28, 2018 (2018-09-28)	May 17, 2019 (2019-05-17)
	10	22	September 27, 2019 (2019-09-27)	April 3, 2020 (2020-04-03)

Episodes

Season 1 (2010–11)

Main article: Hawaii Five-0 (2010 TV series, season 1)

No. overall	No. in season	Title	Directed by	Written by	Original air date	Prod. code	U.S. viewers (millions)
1	1	"Pilot"	Len Wiseman	Story by: Alex Kurtzman & Roberto Orci & Peter M. Lenkov Teleplay by: Peter M. Lenkov	September 20, 2010 (2010-09-20)	101	14.20
U.S. Navy SEAL Steve McGarrett returns to his native Hawaii to find Victor Hesse, a terrorist who murdered McGarrett's father, John McGarrett, a retired officer from the Honolulu Police Department (HPD). He is enlisted by Hawaiian Governor Pat Jameson to head a new task force with legal immunity to clean up the underworld of Oʻahu. In turn, McGarrett enlists Honolulu newcomer Danny Williams, a divorced detective who moved from New Jersey to be closer to his daughter; Chin Ho Kelly, a disgraced police officer and a protege of McGarrett's father; and Kono Kalakaua, Chin Ho's cousin, a former surfer and soon-to-be Police Academy graduate. Together they discover a link between Hesse and a Chinese human trafficking ring with a mole in HPD. After threatening to deport the family of the ring leader, Sang Min, to Rwanda, McGarrett is given the location where Hesse is, on a freighter heading to China.
2	2	"ʻOhana" "Family"	Brad Turner	Sarah Goldfinger & Paul Zbyszewski	September 27, 2010 (2010-09-27)	103	12.72
A National Security Agency expert in cyberterrorism, Roland Lowery (Scott Cohen), is kidnapped by a Serbian gang. While Kono is tasked with looking after Lowery's son Evan (Colin Ford), the rest of the team discover Lowery was working on a "skeleton key", a computer program that would allow the user to hack into anything. Soon, Kono and Evan are kidnapped by the same gang led by Drago Zankovic (Peter Stormare). The rest of the team realize the gang is using the program to shut down the island's radar, allowing a plane to smuggle through. Zankovic intends to sell the program to the occupants of the plane. In the end, the team celebrate Kono's Police Academy graduation.
3	3	"Malama Ka ʻAina" "Respect the Land"	Paul Edwards	Carol Barbee & Kyle Harimoto	October 4, 2010 (2010-10-04)	102	12.24
The team fall witness to a shooting between Triad and Samoan gangs during a high school football game which they were watching. Chin Ho chases a suspect, only to find it is Sid (Sidney Liufau), his cousin, who later reveals himself to be working undercover in a gang unit. Sid refuses to have anything to do with Chin Ho because of Chin's past with the HPD and also because of the corruption charge that Chin has. McGarrett and Danny discover that Frank Salvo (James Russo), a Mafia boss from New Jersey, is meeting with the head of the Samoan gang, after which there could be a full blown gang war. Meanwhile, Danny fights to keep shared custody of his daughter as she was present at the football game shooting. In the end, the team decides to name themselves "Five-0", after McGarrett's high school football jersey number.
4	4	"Lanakila" "Victory"	Alex Zakrzewski	Peter M. Lenkov & Alex Kurtzman & Roberto Orci	October 11, 2010 (2010-10-11)	105	10.69
Five-0 are tasked to find Walton Dawkins (Balthazar Getty) a convict who broke out of prison. They later find he is targeting a couple, who recently won a million dollars and free trip to Hawaii on a game show. Dawkins kidnaps the boyfriend, Craig Ellers (Kenneth Mitchell), who is revealed to be Dawkins' former partner in crime. The two previously robbed five million dollars before Ellers placed it in a bank while Dawkins goes to prison. Meanwhile, McGarrett reunites with his sister Mary (Taryn Manning) when she comes to visit and asks his on-again, off-again girlfriend Navy Intelligence Officer Catherine Rollins for "a favor" in watching over her. Danny has a knee injury which he jokingly blames on McGarrett's unorthodox tactics for getting the job done. Note: This is the first episode to feature Taryn Manning as a main cast member credited as "also starring"
5	5	"Nalowale" "Forgotten/Missing"	Brad Turner	J. R. Orci & David Wolkove	October 18, 2010 (2010-10-18)	104	10.94
Amanda Reeves, the adult daughter of U.S. Ambassador to the Philippines Michael Reeves, is found drowned. Governor Jameson takes a personal pledge to find those responsible and enlists Five-0. Over the course of the investigation, they learn Amanda's sister Robin is still alive and was last found in a nightclub. McGarrett and Danny discover somebody drugged both sisters and sold them to a sex trafficking ring. They learn from the head of the operation that they were ordered to kidnap the sisters from a Filipino terrorist organization, headed by Carlos Bagoyo (Patrick Gallagher), who is using the ransom demand to get to Reeves and log into a database. Meanwhile, Mary finds her father's tool box that he left for her brother to solve a crime and starts investigating herself. The team meets quirky medical examiner Max Bergman (Masi Oka).
6	6	"Koʻolauloa" "North Shore of Oʻahu"	Matt Earl Beesley	Carol Barbee & Kyle Harimoto	October 25, 2010 (2010-10-25)	106	10.23
Ian Adams (Mark Cunningham), the head of Kono's former pro surfing team, is shot in front of a large crowd. McGarrett suggests Kono sit out the case, but she insists on finding the killer. She talks with old friend Ben Bass (Joshua Dallas), the son of Carlton Bass (Kevin Sorbo) who was Adams's business partner. She learns that he founded a surf village located near the beach where Adams was killed, but local gangsters are trying to get them to leave.
7	7	"Hoʻapono" "Accept"	James Whitmore Jr.	Peter M. Lenkov & Jim Galasso	November 1, 2010 (2010-11-01)	107	10.86
Ex-Navy SEAL Graham Wilson (Adam Beach) is being pursued by HPD, fleeing the scene of his wife's murder, and takes a group of tourists hostage aboard the USS Missouri in Pearl Harbor. He claims to be innocent and forces the authorities to find the real killer. Governor Jameson's new public safety liaison Laura Hills seeks the help of Five-0. McGarrett boards the Missouri while the rest of the team pieces together what actually happened at the crime scene. On-board Missouri, McGarrett's plan is assisted by Ed McKay (Robert Loggia), a retired sailor who had served with McGarrett's grandfather on the USS Arizona during the attack on Pearl Harbor. After Wilson's daughter (Mackenzie Foy) is kidnapped, it seems apparent he was framed, and the team shifts priority to recovering the girl.
8	8	"Manaʻo" "Belief"	Matt Earl Beesley	Paul Zbyszewski & Jim Galasso	November 8, 2010 (2010-11-08)	108	10.23
Danny is shocked to discover his former HPD partner, Meka Hanamoa, is found dead at a lūʻau. Furthermore he learns HPD is not investigating who murdered him because Internal Affairs is investigating Hanamoa for possible police corruption, led by the same man who investigated Chin Ho. Hanamoa's most recent partner Kaleo (Jason Scott Lee) works with Five-0 and find Hanamoa may have worked with the Ochoa cartel, led by Emilio Ochoa (Christian George). Although they plan to capture him alive, Kaleo kills him, claiming he was defending himself. McGarrett remembers that Sang Min had a mole in HPD (who identified Kono as a cop in "Pilot",) so they ask Sang Min to identify the mole.
9	9	"Poʻipu" "The Siege"	Brad Turner	Story by: Peter M. Lenkov & Shane Salerno Teleplay by: Shane Salerno	November 15, 2010 (2010-11-15)	109	10.34
When a security detail member is found murdered in a hotel room, Five-0 discovers he was assigned to protect General Pak (Ric Young), a mass-murdering military general from Sandimar, who is due at the upcoming Oʻahu Foreign Aid Summit. Working with an old SEAL buddy Nick Taylor (Max Martini), McGarrett and the team discover the murderer is Erica Raines (Emmanuelle Vaugier), a former Central Intelligence Agency (CIA) assassin. When the team confronts her, she attempts to flee but gets hit by a bus and dies. When Pak and his family arrive in Hawaii, Five-0 learns that Taylor was in on a plan to assassinate Pak.
10	10	"Heihei" "Race"	Elodie Keene	Sarah Goldfinger	November 22, 2010 (2010-11-22)	110	12.34
In Waikiki, four masked assailants in white coats rob an armored car shooting all three guards, killing two of them in broad daylight. Five-0 quickly recover the van as well as the money, leaving them confused but realizes the gang is likely to strike a bigger target during a triathlon event, which is being held the next day. Furthermore, the robbers are athletes taking part in the event and are living next door to Danny's ex-wife Rachel (Claire van der Boom).
11	11	"Palekaiko" "Paradise"	Frederick E. O. Toye	David Wolkove & J. R. Orci	December 6, 2010 (2010-12-06)	111	10.51
Five-0 investigate when Erica Harris is found by two hunters, not knowing what she was running from. Erica is on her honeymoon with her husband, Jake Harris. Her mother-in-law suspects her of being involved, having possibly only married Jake for his money and that she is in debt. Jake is found dead in their hotel room, and Max Bergman discovers a series of related murders in 2009 where couples were targeted. Five-0 realize they are dealing with a serial killer who was engaged to a woman that called off the wedding, and Five-0 believe he later killed her. Meanwhile, McGarrett reveals to Chin the Champion Spark Plugs tool box left to him by his father, showing pictures and files about Yakuza activity. There are also a set of unexplained numbers. Chin reveals the numbers were a case file that mysteriously disappeared, involving McGarrett's mother's death.
12	12	"Hana ʻaʻa Makehewa" "Desperate Measures"	Chris Fisher	Story by: Peter M. Lenkov Teleplay by: Carol Barbee & Kyle Harimoto	December 13, 2010 (2010-12-13)	112	10.91
A weapons dealer wanted by Interpol is found dead after washing ashore. Surveillance shows the victim walking with Victor Hesse, the man who killed McGarrett's father and survived being shot. He visited a doctor whom he later kills after having the bullets removed from his torso, and has been off the grid for four months. To track him down, Five-0 reluctantly enlist the help of Sang Min, the human trafficker arrested from the pilot. When they arrive at the bar, Sang Min betrays them and helps Hesse escape. Chin Ho tracks them to a ship, but is knocked out and awakens the next morning with a bomb attached to his neck. Hesse demands $10 million in exchange for his life. Five-0 is forced to break into the vault and "borrow" the money they need. As Five-0 celebrate Christmas, Hesse is seen meeting with Wo Fat in prison, who wants to know how much McGarrett knows about his father's case.
13	13	"Ke Kinohi" "The Beginning"	Brad Turner	Story by: Peter M. Lenkov Teleplay by: Nicole Ranadive	January 3, 2011 (2011-01-03)	113	11.00
McGarrett awakens to masked men breaking into his house and stealing the Champ box containing the investigation into his mother's murder. Mary is kidnapped for her own investigation and calls McGarrett from the trunk of a car. Five-0 track the car and rescue her. The two hostiles are members of the Yakuza. Despite that the box is still missing, Mary previously took pictures of every item in the box. They later raid a gambling den and find the third assailant, Hiro Noshimuri, believed to be involved in not only the kidnapping but McGarrett's mother's death. However, he is also connected to Governor Jameson, who warns McGarrett that to put Noshimuri away, they must find solid evidence. After finding the missing box, McGarrett manages to tie Hiro Noshimuri to Mary's kidnapping, but not his mother's death. In the end, McGarrett hears that Hiro Noshimuri's brother has been killed in a car accident. Note: This is the final episode to feature Taryn Manning as a main cast member credited as "also starring"
14	14	"He Kane Hewaʻole" "An Innocent Man"	Chris Fisher	Peter M. Lenkov & Paul Zbyszewski	January 17, 2011 (2011-01-17)	114	10.83
Chin Ho and Kono join HPD in a car chase, which ends with the car crashing and killing the driver. Five-0 finds a severed head in a cardboard box. After finding out the driver's family are illegal immigrants from China, McGarrett tries to clear him, but Danny does not resort to the same courtesy. The team identify the man as Henry Duncan, a thyroid cancer patient being treated by Chin Ho's former fiancée Malia (Reiko Aylesworth). Later, they discover Nicole Duncan (Amanda Schull), the victim's wife is missing. Robert Rovin (Greg Gerrman), the woman's father and businessman, is given a call to deliver five million dollars to a specified location in exchange for his daughter's safety. Things go awry when McGarrett and Danny kill the suspect who takes the money.
15	15	"Kai eʻe" "Tidal Wave"	Duane Clark	Melissa Glenn & Jessica Rieder	January 23, 2011 (2011-01-23)	115	19.34
The population of Hawaii are forced to evacuate the coast in the wake of a tsunami threat. Five-0 investigates the disappearance of Dr. Norman Russell (John Sullivan), the head of the Tsunami Warning Center. McGarrett later realizes that the approaching tsunami does not exist, and that Russell was kidnapped to transmit the false data. After they rescue him, Five-0 discovers that Sam Hale (Brian Goodman), a United States Coast Guard Commander, orchestrated the plot to break into the empty precinct where the $28 million (first mentioned in "Hana ʻaʻa Makehewa") is held. Five-0 decides to confess their previous theft to Governor Jameson, however McGarrett is somewhat disturbed to learn that all $28 million were recovered. Meanwhile, McGarret and Catherine Rollins continue their on-again, off-again relationship. Also, Danny tasks Kamekona with watching over Grace during the investigation.
16	16	"E Malama" "To Protect"	Brad Turner	Story by: Carol Barbee Teleplay by: Kyle Harimoto & Shane Salerno	February 7, 2011 (2011-02-07)	116	11.01
Five-0 are tasked to find Julie Masters (Mariana Klaveno), the key witness against drug cartel leader Aaron Brenner (Robert Prescott). She disappears after Brenner sends two assassins after her. McGarrett and Chin Ho journey through the forest to find her. When Chin Ho finds her, they find there is also a third assassin after her, and a "cleaner". Meanwhile, Danny hears that two assailants carjacked his ex-wife's car. Because Grace was present, he becomes fixated on solving the case. After confronting Rachel's current husband Stan (Mark Deklin), he discovers tapes incriminating housing commissioner Bruce Hoffman (Barry Levi) of corruption. Danny threatens Hoffman to back off or he will expose the tapes to the press.
17	17	"Powa Maka Moana" "Pirate"	Brad Turner	Joe Halpin	February 14, 2011 (2011-02-14)	117	10.73
Twelve college students on a catamaran during spring break are kidnapped by a gang of pirates. As Five-0 lead a search to find the hostages, the pirates make ransom demands of $20 million for each hostage to their wealthy parents. The team storms a house believed to be where the hostages are kept, but instead find a pirate stronghold who were not involved in the kidnapping. After the parents of one of the hostages pay the pirates $400,000 as down payment, their son is found murdered. Afterwards the kidnappers demand that Susan (Vanessa Minnillo), a crew member of the catamaran who evaded the pirates, deliver the money to them. McGarrett gives in, but realizes Susan was involved.
18	18	"Loa Aloha" "The Long Goodbye"	Eric Laneuville	Paul Zbyszewski & Mike Schaub	February 21, 2011 (2011-02-21)	118	10.45
The children of a state judge and prosecutor are killed, one by having the rope cut while zip-lining, the second in a car bombing. After researching cases the state judge & prosecutor worked together on, Five-0 believe the murderer is Travis Roan (Theo Coumbis). His 20-year-old son was prosecuted by the two men for DUI, and was later killed in prison. Meanwhile, Danny's younger brother Matthew (Dane Cook) comes to Hawaii. He later learns that the Federal Bureau of Investigation (FBI) suspects him of fraud. Danny reluctantly tips off his brother. As Matthew leaves the Island, Danny realizes he was wanted for laundering money to a drug cartel.
19	19	"Ne Meʻe Laua Na Paio" "Heroes and Villains"	Matt Earl Beesley	J. R. Orci & David Wolkove	March 21, 2011 (2011-03-21)	119	10.01
Alex Baker, dressed as superhero Captain Fallout during a science fiction convention, falls to his death from a high hotel floor. After following leads in the investigation, Five-0 ultimately learn that Baker was drunk and went to the wrong room that was just above his own. The room's owner was in possession of a memory card containing footage of Lindsay Roberts, a young woman who disappeared (and was murdered) in late 2008, who had been having an affair with her boss, Richard Davies (D. B. Sweeney). Meanwhile, McGarrett teams up with CIA analyst Jenna Kaye (Larisa Oleynik), who is running her own investigation without the CIA's backing, regarding the deaths of his parents killed by Wo Fat. In the end, Wo Fat meets with McGarrett and warns McGarrett not to dig into his parents' past.
20	20	"Ma Ke Kahakai" "Shore"	Larry Teng	Elwood Reid	April 11, 2011 (2011-04-11)	120	9.54
While hiking in the Ko'olau Range, McGarrett and Danny find a dead body with a gunshot wound. McGarrett falls and breaks an arm while examining him. Later, the team finds the body matches 53-year-old fisherman Jack Leung. It is revealed that Leung took a second job at an air strip, where he came across plans for Donald Rutheford (Wayne Duvall) to help his son leave the country after he is wanted for murder, and was killed for it. Meanwhile, Chin Ho and Kono visit their ailing Aunt Mele. Chin Ho is later forced to admit that it was their uncle who stole the $200,000 for a kidney from the black market to save Auntie Mele, and Chin Ho got the heat for the theft. In the end, they learn Mele died.
21	21	"Hoʻopaʻi" "Revenge"	Duane Clark	Story by: Shane Salerno & Peter M. Lenkov Teleplay by: Shane Salerno	April 18, 2011 (2011-04-18)	121	11.44
NYPD detective Reggie Cole (Sean Combs) has been undercover for the FBI working for a New York crime boss Jimmy Cannon (Keith David) for two years. The boss' trip to Hawaii also allows for Reggie to briefly drop in on Lisa, his wife (Selita Ebanks) and son Kevin. One night, two gunmen attack his home, kill his wife and seriously wound him. Though warned by the FBI not to pursue Cannon, Five-0 continue anyway. Realizing Cole is tracking the investigation, the team later catch up to him, where he announces a surprising development in the case: Cannon did not order his wife's death. Cole is cleared for the first gunman's death and is then allowed to continue the investigation in taking down Cannon.
22	22	"Hoʻohuli Naʻau" "Close to Heart"	Brad Turner	Story by: Peter M. Lenkov Teleplay by: Kyle Harimoto	May 2, 2011 (2011-05-02)	122	9.83
A world-renowned photographer, Renny Sinclair, is shooting swimsuit models, one of which he was planning a new life with after finding out she is pregnant with his child, when he returns to his trailer, which then explodes. Five-0 discovers a connection to Sinclair and Derek Marcum, a betting shop owner who loaned Sinclair almost $291,570. It is later revealed that this amount of money is equal to the Department of Agriculture's estimated cost of raising a child to age 18. Sinclair has a daughter from a previous relationship, who also happens to be an assistant of his. Chin Ho is called by Internal Affairs to testify against his uncle after he confesses that it was he and not Chin Ho, who stole the money in the corruption case. Chin Ho responds by "confessing" he took the money, but never spent it. He is ordered to pay it back, but since he was bluffing, Chin Ho goes to Marcum for a loan.
23	23	"Ua Hiki Mai Kapalena Pau" "Until the End is Near"	Steve Boyum	Story by: Peter M. Lenkov Teleplay by: David Wolkove	May 9, 2011 (2011-05-09)	123	9.45
Five-0 and Jenna Kaye close in on Wo Fat's whereabouts, but find Sang Min instead. Min evades the team during a chase, during which Danny spots a dead man in an apartment. Danny is infected with sarin nerve gas. While he recovers, the team's search for Wo Fat is on hold until they solve the sarin case. Kono finds that a Russian terrorist with connections to sarin is on the island. He dies accidentally exposing himself to sarin while Five-0 give chase to him, but they find the canisters in his car are all empty and were made by a company run by Elliot Connor and owned by Jeff Fallon, who lives in the same house in which the first victim was found. Meanwhile, IA reveals the money Chin Ho paid back was not from the $28 million dollars, and they would arrest his uncle. Sang Min shows up and gives himself up. He wants protection because Wo Fat wants him dead.
24	24	"Oia'i'o" "Trust"	Brad Turner	Peter M. Lenkov & Paul Zbyszewski	May 16, 2011 (2011-05-16)	124	10.41
Chin Ho turns down HPD's offer to rejoin the force. On his way out, he finds officers bringing in the burnt money Hesse burned (in "Hana ʻaʻa Makehewa"). Meanwhile Laura Hills is killed by a bomb. McGarrett and Danny examine her home and find she was the one who sent McGarrett clues from the Champ box. They also find a key McGarrett believes opens a desk in Governor Jameson's mansion, that has fingerprints belonging to McGarrett. They find a suspect who can testify against Wo Fat, but is later killed during transport. McGarrett believes Jameson is involved. He breaks into the mansion to find evidence that she knew Hills was sending McGarrett the information. When he returns to Five-0, HPD arrives to arrest him for Hills' murder. He escapes and asks Kamekona for arms. McGarrett breaks into the mansion again and forces Jameson to confess to Hills' murder only to be tasered by Wo Fat, who takes his gun, kills Jameson, and places it back in McGarrett's hand. Police and Chin Ho, who regained his position with HPD, arrive to arrest McGarrett. Kono is also arrested for stealing the $10 million from the forfeiture locker.

Season 2 (2011–12)

Main article: Hawaii Five-0 (2010 TV series, season 2)

No. overall	No. in season	Title	Directed by	Written by	Original air date	Prod. code	U.S. viewers (millions)
25	1	"Haʻiʻole" "Unbreakable"	Steve Boyum	Peter M. Lenkov & Paul Zbyszewski	September 19, 2011 (2011-09-19)	201	12.19
After Steve McGarrett is arrested for Governor Jameson's murder, Danny brings in Joe White to help clear him. Victor Hesse aids in McGarrett's escape by stabbing him. On his way to the hospital, McGarrett breaks out. Kono Kalakaua is suspended for her theft, but assists Chin Ho Kelly. She finds Wo Fat meeting with a weapons buyer, Kurt Hauff and is caught. Danny discovers footage of a meeting between John McGarrett, Governor Jameson, and Wo Fat on the camera, and Steve suggests asking Hesse about the meeting. Before they can question Hesse, Wo Fat kills him and is seen being driven away by Jenna Kaye. Note: This is the first episode to feature Masi Oka as a main cast member.
26	2	"Ua Lawe Wale" "Taken"	Duane Clark	Melissa Glenn & Jessica Rieder	September 26, 2011 (2011-09-26)	202	11.26
Governor Denning assigns Homeland Security officer Lori Weston (Lauren German) to Five-0 to ensure the team follows the new rules set by him and to also apply her profiling skills to the task force. Their first investigation is the kidnapping of teenage paddleboard champion Jenn Hassley (Hayley Chase), and they have 24 hours to find her because she is taken without the medicine she needs to stay alive. They find that their suspect, Matt Porter (Jason Rawcliffe), actually rescued girls from religious cults. The team finds a cult in the island of Lānaʻi that rejects all modern teachings and believes that society and its own trappings are the workings of the Devil. Meanwhile, Jenna leaves the team after receiving word that her fiancé may still be alive. Elsewhere, Internal Affairs captain Vince Fryer (Tom Sizemore) strips Kono of her badge.
27	3	"Kameʻe" "The Hero"	Jeffrey Hunt	Elwood Reid	October 3, 2011 (2011-10-03)	203	11.07
Five-0 probes the death of a Navy SEAL, one of Joe White's former charges. Initially ruled as a suicide, the team discovers he was drugged and murdered to mimic a suicide. Sometime later, the team uncovers the death of another SEAL in a car accident, however Max finds he was killed before the accident. It emerges that both SEALs were part of a covert team tasked with taking down a Central American drug cartel and a professional hitman is after a third SEAL. Meanwhile, Chin Ho worries about Kono after she starts hanging out with a group of dirty ex-cops, including Frank Delano (William Baldwin).
28	4	"Mea Makamae" "Treasure"	Duane Clark	David Wolkove	October 10, 2011 (2011-10-10)	204	10.07
The severed hand of deep-sea diver Blake Spencer is found in the waters of Waikiki. Five-0 discover that he found treasure from a sunken galleon off the Oahu coast, which later turns out to be fake. Meanwhile, Chin Ho realizes Kono logged onto HPD's database with his password, which she is using to grant Delano access. McGarrett realizes White did not release the video with Wo Fat, Governor Jameson, and John McGarrett to the Department of Defense, and White claims he was trying to protect John. Note:The role of the diver's mother, who suffers from Alzheimer's, was played by Patty Duke.
29	5	"Maʻemaʻe" "Clean"	Steve Boyum	Stephanie Sengupta	October 17, 2011 (2011-10-17)	205	11.07
Five-0 investigates the death of a volleyball coach, which leads them to a married couple where he stayed, Carl and Trisha Joyner. Trisha ends up missing, and Carl is killed by a sniper. Lori and Chin end up mortally wounding a gunman, who is being driven by Kono. When Five-0 arrests Kono, Captain Fryer of Internal Affairs reveals she is working undercover to stop Delano. Kono is reinstated to the task force. Meanwhile, Chin Ho and his former fiancee Malia (Reiko Aylesworth) begin spending time together again. Note: This is the first episode to feature Lauren German as a main cast member.
30	6	"Ka Hakaka Maikaʻi" "The Good Fight"	Larry Teng	Kyle Harimoto	October 24, 2011 (2011-10-24)	206	10.70
Five-0 investigate the murder of local restaurant owner and philanthropist Jake Griffin, seemingly part of a series of home invasions in the area. However, after catching the gang, they realize they did not murder the man. Later, McGarrett participates in a charity MMA fight against Chuck Liddell, taking the place of another fighter (Gino Anthony Pesi) whom he injured after Martel attempted to frame him. Meanwhile, Joe White calls in L.A NCIS agent Kensi Blye (Daniela Ruah) to review the video of John McGarrett, Governor Jameson, and Wo Fat, but only recognizes the word "Shelburne". When White returns home, he encounters Wo Fat, who tries to kill him. After White pushes him away, he goes to Mokoto, but finds Wo Fat beat him to it and killed Mokoto.
31	7	"Ka Iwi Kapu" "Sacred Bones"	Joe Dante	Michele Fazekas & Tara Butters	October 31, 2011 (2011-10-31)	207	10.60
A young couple is murdered on a heiau while shooting a documentary on Halloween night. During the autopsy, Max uncovers a fingerprint from a criminal who was killed by his girlfriend several months before. Later, while examining the burial ground through ground-penetrating radar, Five-0 initially assumes they are dealing with a serial killer when they find several bodies not belonging to the ancient Hawaiians. Meanwhile, Danny ignores the warnings of his co-workers and a drifter (Robert Englund), and later finds out the hard way the consequences of trespassing on the burial grounds. Danny then decides to buy one of the victim's apartments, but changes his mind after believing that he saw the ghost of one of the tenants before ordering the team to pack up everything, much to their dismay.
32	8	"Lapaʻau" "Healing"	Steve Boyum	Joe Halpin	November 7, 2011 (2011-11-07)	208	10.32
Immigration and Customs Enforcement (ICE) agent Monica Jensen is found dead inside a plane crash off the coast of the North Shore. Max's autopsy reveals she was dead long before the plane even took off, and Five-0 learns that Jensen was investigating possible illegal activities at a medicinal marijuana shop. Danny decides to adopt Jensen's dog.
33	9	"Ike Maka" "Identity"	Bryan Spicer	Mike Schaub	November 14, 2011 (2011-11-14)	209	11.71
Sergeant Duke Lukela and his team in the HPD uncover a car theft ring but pass the case on to Five-0 after a bandaged body is discovered in the trunk of one of the cars. The team find it nearly impossible to identify the victim because he had extensive plastic surgery. Eventually, they find that he was placed in witness protection after he witnessed an Irish Mob hit in Boston. Meanwhile, Danny is forced to sleep on McGarrett's couch until he can find another apartment. Elsewhere, Steve and Danny try and figure out why Max is ignoring them and acting overly friendly to Lori.
34	10	"Kiʻilua" "Deceiver"	Kate Woods	Peter M. Lenkov & Paul Zbyszewski	November 21, 2011 (2011-11-21)	210	10.59
Bethany Morris is found murdered in her apartment. Jenna Kaye receives news her fiancé is alive, but wants McGarrett to rescue him in North Korea. When they arrive Jenna double crosses McGarrett, revealing she is working with Wo Fat, and captures him in exchange for her fiancé. Wo Fat later interrogates and tortures McGarrett to find out what Shelburne is. When they learn of McGarrett's capture, they and Joe White along with a SEAL team go on a mission to rescue him. Jenna helps McGarrett escape but is killed in the process. As they return to Hawaii, Chin Ho announces he is engaged to Malia again.
35	11	"Pahele" "Trap"	Paul Edwards	Melissa Glenn & Jessica Rieder	December 5, 2011 (2011-12-05)	211	11.01
Governor Denning announces that a large shipment of cocaine was seized by a previous bust. In retaliation, a school bus full of private students is hijacked. The kidnappers, who work for a drug cartel, demand that Five-0 returns a large shipment of cocaine. Meanwhile, Joe White is forced into an early retirement after rescuing McGarrett in North Korea and he continues to investigate "Shelburne", kidnapping Hiro Noshimuri in the process. Noshimuri tells McGarret that Shelburne is an unidentified person, the only one Wo Fat fears. White is later seen calling an unknown person and tells them that they have to move due to McGarrett getting too close in his investigation.
36	12	"Alaheo Pauʻole" "Gone Forever"	Jeff T. Thomas	Elwood Reid	December 12, 2011 (2011-12-12)	212	11.17
Three teens discover a body in an abandoned World War II bunker but when Steve and Max examine the body for themselves, they discover that the supposedly dead victim is actually alive, which leads them to cross paths with newly promoted Chief of Detectives, Vince Fryer. Meanwhile, Five-0 prepare for Chin and Malia's wedding. Also, Hiro Noshimuri’s son Adam tells McGarret that his father has not been seen ever since Joe White kidnapped him.
37	13	"Ka Hoʻoponopono" "The Fix"	Steve Boyum	Stephanie Sengupta	January 2, 2012 (2012-01-02)	213	11.90
A 17-year-old girl is found smothered to death in her bedroom. Before her death, she stole $5,000 from her father after her best friend Carolyn (Courtney Coleman) was blackmailed for having sexual relations with their school principal. When the blackmailer discovers he also recorded the girl's murder, Five-0 find she was killed by a professional hitman. Meanwhile, Joe returns from Japan again and is later kidnapped by Adam Noshimuri (Ian Anthony Dale), Hiro's son, who believes he murdered him. When McGarrett later rescues him, Joe reveals he actually faked Hiro's death, but would not say why. McGarrett gets angry at this, knowing that he went through torture by Wo Fat.
38	14	"Puʻolo" "The Package"	Christine Moore	David Wolkove	January 16, 2012 (2012-01-16)	214	10.73
A Trans-Hawaiian Parcel truck is violently robbed in broad daylight but Kono's investigation reveals nothing missing. They reluctantly rely on Sang Min's help when it has emerged that one of the couriers smuggled 100 electronic chips used in passports to allow smugglers to forge them. Meanwhile, Danny is called to the hospital to help his ex-wife Rachel deliver her baby since her husband Stan is out of town. The Yakuza attempts to have Joe killed. Seeing how the situation is getting out of hand, Joe eventually agrees to tell Adam that his father is in hiding from Wo Fat. Later, Joe reveals to McGarrett that he is Shelburne, and he killed Wo Fat's father.
39	15	"Mai Ka Wa Kahiko" "Out of the Past"	Larry Teng	Bill Nuss	February 6, 2012 (2012-02-06)	215	9.97
A US Marshal and friend of Danny's is found dead. Five-0 begins searching for the prisoner he escorted, Rick Maguire, but soon discovers that Maguire died two years ago, and that someone is posing as him. It is revealed that the person in question is Rick Peterson, Danny's ex-partner from New Jersey who was jailed for corruption. Peterson returned seeking revenge against Danny who testified at Peterson's trial and has kidnapped Grace.
40	16	"I Helu Pu" "The Reckoning"	Eric Laneuville	Paul Zbyszewski	February 13, 2012 (2012-02-13)	216	9.70
Five-0 finds a young woman dead in a hotel where Denning is hosting a charity silent auction. They discover the suspect is hiding and being protected by the Russian consulate. To lure him out, Chin Ho breaks into the consulate, setting off an international incident. McGarrett chases the suspect, but both get hit by a car driven by Five-0 member Lori Weston. The international fallout prompts the Governor to punish Lori by forcing her to resign from the task force. Note: This is the last episode to feature Lauren German as a main cast member.
41	17	"Kupale" "Defender"	Steve Boyum	Noah Nelson & Lisa Schultz	February 20, 2012 (2012-02-20)	217	10.40
After McGarrett returns home from reservist training, Five-0 probes the death of Brandon Koruba, a local shipbuilder who enjoys Hawaiian history, in the jungle near the site of a historical war re-enactment he participated in. The team realizes Koruba was targeted by a fundamental environmentalist group after he was planning to introduce a ferry that would damage the eco-systems of the Hawaiian waters. Meanwhile, McGarrett and Danny argue about Danny's apprehension to introducing Grace to his girlfriend Gabrielle Asano.
42	18	"Lekio" "Radio"	Bryan Spicer	Kyle Harimoto	February 27, 2012 (2012-02-27)	218	9.58
Five-0 probes the death of pirate radio DJ Bobby Raines (Dennis Miller), who was killed in his home studio by an IED. The investigation pauses temporarily when his body is stolen by his fans, known as "Acolytes". When the body is recovered, they uncover a prime suspect, retired NYPD bomb expert Tony Archer (James Caan, Scott Caan's father), whose team of officers was a constant target of Raines.
43	19	"Kalele" "Faith"	Frederick E. O. Toye	Joe Halpin	March 19, 2012 (2012-03-19)	219	9.31
McGarrett's sister Mary (Taryn Manning), returns to Hawaii for a visit, revealing she is now a flight attendant. When she returns to her hotel room, a Liberian man (Tony Todd) forces her to smuggle $20 million worth of conflict diamonds to New York, or else fellow flight attendant and friend Angela will die. She is caught before she can board the flight, and the team now have nine hours until the plane lands to save Angela. Five-0 and Chief Fryer team up and enlist the help of August March (Ed Asner), who served a 30-year sentence for smuggling diamonds.
44	20	"Haʻalele" "Abandoned"	Jerry Levine	Elwood Reid	April 9, 2012 (2012-04-09)	220	10.30
The body of a young woman is found, and Max's autopsy reveals the trademarks of a serial killer known as "The Trashman", even though the apparent killer has been imprisoned. In the investigation, Five-0 finds a link between past and current victims; all women gave birth and left their infants at the same parish. The team finds evidence that links the caretaker to the killer. Meanwhile, Kamekona believes someone has stolen his shrimp truck but as it turns out, he just forgot to renew his license, causing the City of Honolulu to impound the truck. Later, Danny tries to call Steve who ignores the call with Steve later shown to be in Tokyo, Japan, ready to board a plane.
45	21	"Pa Make Loa" "Touch of Death"	Bryan Spicer	Michele Fazekas & Tara Butters & R. Scott Gemmill	April 30, 2012 (2012-04-30)	221	10.91
With McGarrett still out of the country, Five-0 investigates the death of a former army soldier from an advanced form of smallpox. They find that the victim, and several others who are missing, were exposed to smallpox believing they were testing with a new form of antidepressant. They find a suspect, Dracul Comescu of the Romanian Comescu crime family. Agents Sam Hanna (LL Cool J) and G Callen (Chris O'Donnell) of the NCIS OSP in Los Angeles are called in to assist Five-0 as Callen has history with Comescu. This episode begins a crossover event that concludes on NCIS: Los Angeles season 3 episode 21.
46	22	"Ua Hopu" "Caught"	Larry Teng	Stephanie Sengupta	May 7, 2012 (2012-05-07)	222	9.39
In Osaka, McGarrett and Interpol find and arrest Wo Fat, who surrenders a bit too easily. In addition, it is revealed that Wo Fat found and killed Hiro Noshimuri and that Kono is dating Hiro's son, Adam. In Honolulu, the rest of Five-0 traces a phone call Wo Fat made to an undercover CIA agent, Wo Fat's "get out of jail free card", who is found dead. As McGarrett and Wo Fat's plane approaches Hawaii, McGarrett finds that the pilots are Yakuza. During the struggle, the plane crashes in the Oahu jungle, leaving McGarrett and Wo Fat as the only two survivors and at the mercy of more Yakuza operatives with the intent to kill Wo Fat in revenge for the death of Hiro Noshimuri.
47	23	"Ua Hala" "Death in the Family"	Steve Boyum	Peter M. Lenkov & Paul Zbyszewski & Elwood Reid	May 14, 2012 (2012-05-14)	223	11.42
Danny learns Stan and Rachel are moving to Las Vegas, and faces losing custody of Grace. After arriving at the scene of a fake murder, Fryer is killed. Five-0 investigates the scene, the shooter wounds Max before escaping with a police car. The team chase the shooter to HPD headquarters, where they use a gas leak to blow up the building. The culprit, Hillary Chaver, was a criminal Fryer and Delano once worked to catch, until she faked her death. It becomes apparent that Chaver had a partner who also worked with Delano, and Chin is blackmailed into breaking Delano out of prison after Kono and Malia are kidnapped and Delano forces Chin to choose which one to save. Meanwhile, McGarrett and Joe return to Japan where Steve meets Shelburne, who turns out to be his dead mother.

Season 3 (2012–13)

Main article: Hawaii Five-0 (2010 TV series, season 3)

No. overall	No. in season	Title	Directed by	Written by	Original air date	Prod. code	U.S. viewers (millions)
48	1	"La O Na Makuahine" "Mother's Day"	Bryan Spicer	Peter M. Lenkov	September 24, 2012 (2012-09-24)	301	8.06
McGarrett reluctantly begins to reconcile with his presumed-dead mother Doris (Christine Lahti), who was revealed to be Shelburne in the previous episode. She admits that she was a spy who murdered Wo Fat's (Mark Dacascos) father, and later faked her death to protect herself. Meanwhile, Kono is pulled from the water by Adam Noshimuri (Ian Anthony Dale), having been alerted by Chin. Chin races back home to save his wife Malia, but she succumbs to her injuries and dies, leaving Chin devastated. Furthermore, Frank Delano (William Baldwin), who arranged those events, also breaks Wo Fat out of prison. Delano asks Wo Fat to help him smuggle drugs out of Hawaii, and in exchange he will give him Shelburne's location. McGarrett returns to Hawaii and places Doris into custody under his girlfriend Catherine Rollins (Michelle Borth). Chin avenges his wife's death by shooting Delano after an intense gun battle, ending with Delano running out of bullets and Chin choosing to kill him anyway. One of Delano's dying men reveals that Wo Fat knows where Doris is. Wo Fat escapes after Doris fires three shots. At the end of the episode, Steve sends his mom away from the island to protect her from Wo Fat, but as her plane departs, Danny shows up and reveals that she fired the three shots into the ground, making Steve wonder why she apparently let Wo Fat escape. Note: This is the first episode to feature Michelle Borth as a main cast member
49	2	"Kanalua" "Doubt"	Frederick E. O. Toye	Joe Halpin	October 1, 2012 (2012-10-01)	302	7.95
Following an elaborate art heist, the Five-0 team finds the getaway car along with the driver who was shot in the head before he and the car were set on fire. The driver is identified as a former NASCAR driver, who was forced to work for the thieves after they kidnapped his daughter. The team calls on August March (Ed Asner) for help in tracking the daughter. Meanwhile, Steve asks Catherine for assistance in tracking his mother. She finds that Doris is hiding somewhere on the island. Meanwhile, the team tries to help Chin cope with the death of his wife.
50	3	"Lana I Ka Moana" "Adrift"	Steve Boyum	Elwood Reid	October 8, 2012 (2012-10-08)	303	8.39
McGarrett and Danny are fishing in the ocean when they rescue a man (Todd Stashwick) lost at sea on a raft. However, the man pulls out a gun and hijacks the boat while also stranding McGarrett and Danny at sea. The two find a disabled yacht, and come across a dead body, shot by the same weapon used by the hijacker.
51	4	"Popilikia" "Misfortune"	Christine Moore	Stephanie Sengupta	October 15, 2012 (2012-10-15)	304	8.70
Professional polo player Billy Keats (Robbie Amell) is found decapitated by a garroting wire tied between two poles while he was playing. One of his friends, Jake Madsen (Guy Wilson), reveals to Five-0 that he believes Jake was the intended target. It is further revealed that Jake was kidnapped ten years ago, but escaped before a ransom was paid. Meanwhile, Doris reunites with McGarrett. Doris claims the reason why she shot at the floor was due to a struggle between her and Wo Fat, however McGarrett reveals to Danny that he does not believe her. Doris meanwhile, secretly recovers a microfiche from a cavity under McGarrett's home.
52	5	"Mohai" "Offering"	Jerry Levine	Story by: Peter M. Lenkov & David Wolkove Teleplay by: David Wolkove	November 5, 2012 (2012-11-05)	307	7.53
On Halloween night, Five-0 investigates a road accident where the drivers of both vehicles are missing. One of the drivers is later found murdered, having died as a ritualistic sacrifice, most likely by the other driver. The team learn that Lisa Heller, one of the victims, was at a party in a condemned house and find the killer took another victim, Lucas Hayes (Jordan Matlock), to murder him in a similar ritual by the following night.
53	6	"I Ka Wa Mamua" "In a Time Past"	Sylvain White	Story by: Peter M. Lenkov Teleplay by: Ken Solarz	November 12, 2012 (2012-11-12)	305	7.96
The team investigate an explosion where they find traces of acetone peroxide, which are used by Middle Eastern terrorists, indicating a terrorist cell is active in Hawaii. A discovery of the terrorist hideout leads Five-0 to a planned attack at a military base where the Secretary of Defense is speaking at an event. Five-0 and HPD manage to secure the area, locate and disarm the bomb, but the terrorist responsible has escaped. Danny ultimately finds the man and shoots him, but finds the terrorist was strapped with a bomb with a proximity center, and Danny has to stay still or the vest would explode. As the bomb squad works to defuse the device, McGarrett distracts Danny from his anxiety by asking him to tell the story of how he escaped death in New Jersey. Danny recalls the incident on September 11, 2001, before the attacks, when he and his then partner (Sydney Tamiia Poitier), are captured by gang members (T.I. and Terrence Howard) in their drug operation. At the time Danny's wife was pregnant, and it's implied Danny named their daughter after his partner: Grace Tilwell.
54	7	"Ohuna" "The Secret"	Larry Teng	Mike Schaub	November 19, 2012 (2012-11-19)	306	9.02
Zach Slater (Matt Bush), a teenage boy and expert computer hacker, is released from juvenile hall but is abducted shortly after and later found dead. Five-0 realize he had files in his hard drive, which was what the killers were after. After Kono discovers Zach's password in his room, the killers, led by South African mercenary Sean Winston (Carlo Rota), storm the house and hold everybody hostage. Meanwhile, Mary Ann McGarret (Taryn Manning) returns for a visit. She's now a caregiver and brings her patient, Morty Sapperstein (Shelley Berman), in tow but is unrelenting in not wanting to see her mother. Her companion however convinces her to see Doris, reciting his story when his estranged daughter was killed years before.
55	8	"Wahineʻinoloa" "Evil Woman"	Steve Boyum	Story by: Stephanie Sengupta & Courtney Kemp Agboh Teleplay by: Stephanie Sengupta	November 26, 2012 (2012-11-26)	308	10.30
Following the murder of Aiden O'Connell in a sugar cane field in Maui, McGarrett is convinced that Olivia Victor (Vanessa Marcil), Aiden's psychologist, is responsible, but her initial arrest is overturned due to lack of evidence. To hinder the investigation, Victor files a restraining order against McGarrett. Meanwhile, Catherine is confronted by WITSEC Agent Channing (Carlos Bernard), now suspended, after Catherine hacked into his account to get information on Doris's whereabouts. They learn that one of her assassination targets, "Mangosta", is still alive and seeking revenge in Hawaii. Doris captures Mangosta and tortures him for information on who else knows she is alive, before Catherine stops her.
56	9	"Haʻawe Make Loa" "Death Wish"	Gwyneth Horder-Payton	Bill Haynes	December 3, 2012 (2012-12-03)	311	9.32
Five-0 investigate a bank robbery where two people are shot, with one of those being a teller Max (Rumer Willis), a witness, was going to ask out. The other, Jim Rogers (Lochlyn Munro), later dies in hospital after one of the robbers returns to silence him. After identifying the leader, mob enforcer Martin Cordova (C. Thomas Howell), the team realizes that Rodgers paid Cordova to rob the bank and attempt a kidnapping so that he can die a hero in order to win the trust of his family. Cordova kidnaps McGarrett, sends him to a remote area and goads McGarrett into killing him, not wishing to die from the cancer. Meanwhile, Danny has to catch a stalker who sent a threatening letter to one of Victoria's Secret's models. The stalker is later identified as Denise Pope (Z. Zoccolante), and Danny kills her before she could murder her target.
57	10	"Huakaʻi Kula" "Field Trip"	Eric Laneuville	Michele Fazekas & Tara Butters	December 10, 2012 (2012-12-10)	309	9.84
McGarrett and Danny accompany Grace's Aloha Girl Scout troop on a camping trip but stumble upon an injured hiker Ron Alberts (Tom Arnold), who shoots Danny and locks him and the girls in a bunker. He takes McGarrett and one of the girls hostage to find something he lost in the jungle- a bag of diamonds he dumped from a plane which crashed. Meanwhile, Kono meets Adam Noshimuri's brother, Michael (Daniel Henney), recently released from prison after serving 10 years for manslaughter, who is less than thrilled with Adam's plans of transforming the Yakuza. In the end of the episode, Michael is revealed to have used Kono's gun while she is sleeping.
58	11	"Kahu" "Guardian"	Bryan Spicer	Noah Nelson	December 17, 2012 (2012-12-17)	312	10.54
Christmas time in Hawaii finds McGarrett and Catherine helping teenager Ethan Awana (Tristan Lake Leabu) find his missing father, after blood is found in the general store he owns. It is later revealed the blood does not belong to the father, but a shooter he was defending himself from. Meanwhile, Kamekona enlists Danny’s help in buying a helicopter for his new air tour company.
59	12	"Kapu" "Forbidden"	Steven DePaul	David Wolkove	January 14, 2013 (2013-01-14)	313	9.59
A university chemistry professor is found dead in an acid bath. The team have a suspect range of 300 people who have access to the labs and equipment. Five-0 later discover that the professor missed lectures in order to pursue other projects, namely bringing back an extinct plant which can hold the key to curing a disease. Meanwhile, Kono is placed in charge of guarding Sang Min, who has returned to Hawaii to testify in a federal case. Sang Min escapes custody to see his family. Kono arranges to have Sang Min transferred back to Halawa prison to be close to them. Danny is saddled with looking after his nephew Eric (Andrew Lawrence), who has recently arrived on the island, who later ends up assisting Five-0 in the case. In the end of the episode, Eric wants to work in the crime lab.
60	13	"Olelo HoʻOpaʻI Make" "Death Sentence"	Bryan Spicer	Steve Cwik	January 20, 2013 (2013-01-20)	314	13.03
Chin is drugged and abducted, later waking up behind bars at the Halawa Correctional Facility. He asks a guard for assistance only to find out said guard is in on the conspiracy, and taken to corrupt and imprisoned detective Kaleo (Jason Scott Lee). Sang Min intervenes to help Chin, and both decide to attempt an escape. Five-0, at first believing he is taking time off to cope with Malia's death, become suspicious when he misses his appointment with a psychiatrist. They find that Chin was kidnapped by Paul Delano (Daniel Baldwin), Frank Delano's brother who is targeting Chin to avenge Frank's death (in "La O Na Makuahine"). Sang Min takes the opportunity to escape by posing as a guard. Kono contemplates snooping into Adam's Yakuza affairs and eventually manages to clone his cell phone.
61	14	"Hana I WaʻIa" "Scandal"	Larry Teng	Mike Schaub	January 21, 2013 (2013-01-21)	310	9.85
At the request of Governor Denning, Five-0 discreetly investigate the murder of a prostitute. However, the team later find that Denning is attempting to impede the investigation. McGarrett confronts the Governor, who reveals that the prostitute may have slept with Chris Freed (Wiley Pickett), a Congressman running to become a Senator. At first suspecting him of the murder, the team later realize that Freed has been kidnapped by Wo Fat, who is forcing him to sign a document. Meanwhile, Danny attends a custody hearing in court regarding Grace. At one point, McGarrett speaks in defense of Danny, even though it is unorthodox. The Judge eventually rules in Danny's favor and he is to get shared custody of Grace.
62	15	"Hookman"	Peter Weller	Story by: Glen Olson & Rod Baker Teleplay by: Joe Halpin	February 4, 2013 (2013-02-04)	315	9.86
Police officer Ben Keoki, a friend of McGarrett's father, is assassinated and a shell casing with his name engraved on it is left behind at the scene. During the raid for the suspect, another officer, Troy Ookala, another friend of McGarret senior, is assassinated. The assassin (Peter Weller) then lures McGarrett to a gun shop. McGarrett and Danny chase him, ending on the assassin's car landing in the ocean, but he escapes. When McGarrett spots a prosthetic hand left over, he realizes that the man they are after is Curt Stoner. He was arrested twenty years ago for armed robbery by the same officers he is targeting, and his hands were blown away during his arrest and is now seeking to avenge himself by killing those responsible including Duke Lukela (Dennis Chun).
63	16	"Kekoa" "Warrior"	Larry Teng	Al Septien & Turi Meyer	February 11, 2013 (2013-02-11)	316	9.64
Kamekona's cousin is found shot to death in the trunk of a car. Danny and McGarrett follow Kamekona, who they believe is trying to avenge the man he thinks is responsible, although it is later revealed that Kamekona's target was not involved in the murder. Video evidence shows the victim being kidnapped beforehand, and between his kidnap and murder, he unwillingly competed in an underground fight-club. The fights were held by mixed martial artist Ramsey Pollack (Keith Jardine), wanted in connection to similar murders. Meanwhile, McGarrett hires Mick Logan (Treat Williams), a private investigator to keep tabs on his mother's whereabouts, which eventually leads the two to start a relationship after Doris knows he was hired by her son.
64	17	"Paʻani" "The Game"	Jeffrey Hunt	Kyle Harimoto & David Wolkove	February 18, 2013 (2013-02-18)	317	9.11
As the island prepares itself for the Pro Bowl, an executive from a California technology company is found dead after a tactical ops team building exercise. Max finds the victim was sedated the night before, and the team trace it back to a bar, where a bar man reveals that he and a female accomplice, "Holly" (Rebekah Steen), marked the victim to steal his money. Five-0 track to her to a hotel, where it is discovered that she is assisted by running back Arian Foster from one of her other accomplices, Timothy Cross (Matt Bushell), who matches the build of the killer. Cross reveals he was hired to steal the data from the victim's laptop which contains a potential invention to a new piece of software.
65	18	"Na Kiʻi" "Dolls"	Duane Clark	Story by: Michael Reisz Teleplay by: Stephanie Sengupta	March 18, 2013 (2013-03-18)	318	8.99
While apprehending his latest fugitive, Dog the Bounty Hunter is witness to a woman falling off a balcony to her death. Max finds evidence that she was drugged a few hours before her death. Five-0 also discovers that the victim led a double life as a roller derby player. Unable to get any useful information about the victim from her teammates, McGarrett orders Catherine to go undercover as the team's jammer. Catherine finds that one of her teammates wanted the victim dead, and hacks into the coach's computer to get a roster. Meanwhile, a masked man steals a safe from Doris. She eventually admits to McGarrett that the safe contains a microfiche with all her CIA assignments unredacted, and that "Mangosta" is involved.
66	19	"Hoa Pili" "Close Friend"	Jeff Cadiente	Story by: Richard Arthur & Kyle Harimoto Teleplay by: Kyle Harimoto	March 25, 2013 (2013-03-25)	319	8.61
The team investigate the latest of a series of arson and bombing attacks to Oahu Shark Tours, and later discover the owner's brother dead in a submerged shark cage. Five-0 first suspects the Kapu to be involved, only to find Kawika's (Kala Alexander) home on fire. Kawika assures McGarrett that he was not involved in the attacks, but another member admits to beating the victim for bringing the sharks closer to the shore, but did not kill him. Eventually, Five-0 discover that the shark tours were targeted because some of the employees discovered a drum of MDMA tablets owned by a drug cartel. Meanwhile, Kamekona passes his helicopter pilot's licence. Leilani, the prison nurse Chin helped in "Olelo HoʻOpaʻI Make", pays him a visit.
67	20	"Olelo Paʻa" "The Promise"	Joe Dante	Peter M. Lenkov & Ken Solarz	April 15, 2013 (2013-04-15)	320	7.65
Before the events of the episode, flashbacks show McGarrett training with Freddie Hart (Alan Ritchson), who considers giving up, until McGarrett convinces him to stay, Freddie ends up becoming a better SEAL. In September 2010, before the events of the pilot, McGarrett and Hart are on a top secret mission to North Korea to capture Anton Hesse, who is under the protection of a militia owned by Han Ji-Woon (Rick Yune). However, Freddie is mortally wounded in the process. In the present, McGarrett and Catherine enter the Korean Demilitarized Zone to bring his body back to the US, however the body they found is not Freddie's. The couple sneak into North Korea to find the real body. McGarrett and Catherine later return to the U.S. with the remains where at the cemetery, Freddie's family along with members of the Navy SEALS including Joe White are seen. Freddie is given a proper military funeral and buried at last, with Steve relieved to see that Chin, Danny and Kono are at the funeral albeit at a small distance.
68	21	"Imi Loko Ka ʻUhane" "Seek Within One's Soul"	Bryan Spicer	Bill Haynes	April 29, 2013 (2013-04-29)	321	7.76
Five-0's case of a mutilated corpse is overshadowed by Savannah Walker (Aisha Tyler), a daytime talk show host who is profiling the unit on her series. While Five-0 investigate, Walker inadvertently walks into Wo Fat, disguised as a patrol officer. After Wo Fat escapes, the team later conclude he did not murder the victim. It is later revealed that the victim, Roger Carson, worked in the Bureau of Engraving and Printing and had a tattoo with a map on it. Ater replicating the map and deducing that the girlfriend's brother was responsible, the team rush to the same place on the map to find the murderer dead. Wo Fat attempts to escape by helicopter, only for Five-0 to shoot it down. Wo Fat is arrested, although he sustains severe burns on one side of his face from the crash.
69	22	"Hoʻopio" "To Take Captive"	Steve Boyum	Story by: Peter M. Lenkov Teleplay by: Noah Nelson	May 6, 2013 (2013-05-06)	322	8.01
After having been missing for 10 years, 17-year-old Amanda Morris is found dead, shot in the back in a shallow grave. The investigation of her body reveals traces of 6-year-old girl Ella Bishop, who was recently reported kidnapped. The team later identify the kidnapper, Helen Cantera, who shoots herself rather than allow herself to get arrested and reveal Ella's location. Kidnappers Ray and Terry Beckett were portrayed by Henry Rollins and Mare Winningham. Meanwhile, with Adam in Osaka, Kono discovers that he is out to meet with "Sato", who through Catherine's assistance, is revealed to be one of the leading members of the Yakuza.
70	23	"He Welo ʻOihana" "Family Business"	Larry Teng	Eric Guggenheim	May 13, 2013 (2013-05-13)	323	7.86
A security guard chases away trespassers at a to-be construction site, only to fall in a hole and then get executed. Later it is revealed that the site has several dead bodies buried underground, where the victims are discovered to be targets of the Yakuza. Kono confronts Adam about the site and Sato. Adam claims he met with Sato to leave the Yakuza, and has no knowledge of the site, though he suspects Michael may be behind it. Kono later traces one of Adam's outgoing to calls to a warehouse the Yakuza have been operating. She comes across two gunmen, who she takes down, but is shot herself in the process. Meanwhile, McGarrett discovers that Doris is planning to take back the stolen microfiche, which is in possession of Tyler Cain (Craig T. Nelson), an ex-CIA agent. He decides to join her in the operation, only to be caught and held hostage in the process. Cain offers a trade, Doris for the microfiche, but McGarrett responds by burning the film. When they are both released, McGarrett reveals that he burnt a fake microfiche, and has retrieved the real one. In the end of the episode, Max finds a ballistics match to Kono's weapon on several of the murders and informs Steve and Danny of this with the news leaving both men stunned.
71	24	"Aloha, Malama Pono" "Farewell and Take Care"	Bryan Spicer	Peter M. Lenkov & Ken Solarz & David Wolkove	May 20, 2013 (2013-05-20)	324	9.00
Five bodies are found aboard a plane that was transporting Rafael Selgado (Michael Irby), a terrorist from the organization NLM, who is missing. His son is also missing, although when Five-0 eventually catch Selgado, he reveals that his son was kidnapped to prevent him from co-operating with the authorities to reveal the location of a planned terrorist attack in San Francisco. In order to learn the target, Five-0 must rescue his son. During an exchange of his son, Five-0 intercept. Selgado is mortally wounded in the process, but reveals the target's location before he dies. As this transpires, Kono is wanted by the police for the murders, and hides in Adam's house until she can clear her name. Michael, who was framing her, finds Adam and Kono and attempts to kill his brother, but Adam kills Michael after a struggle over the gun instead. Although Kono is later cleared, Chin reveals that the Yakuza wants Adam dead for trying to leave, and he and Kono decide to leave Hawaii until the opponents are stopped. McGarrett learns that his mother paid a visit to Wo Fat. McGarrett visits the detention center to see Wo Fat, only to find it being under attack. Wo Fat wants McGarrett to save his life in exchange for revealing why Doris visited him.

Season 4 (2013–14)

Main article: Hawaii Five-0 (2010 TV series, season 4)

No. overall	No. in season	Title	Directed by	Written by	Original air date	Prod. code	U.S. viewers (millions)
72	1	"Aloha Ke Kahi I Ke Kahi" "We Need Each Another"	Bryan Spicer	Peter M. Lenkov & Ken Solarz	September 27, 2013 (2013-09-27)	401	9.46
Continuing from the previous episode, NLM gunmen break into Wo Fat's cell, but McGarrett saves him by killing all but one of them, Ricardo Cosi. After taking him to Five-0 headquarters to interrogate him, more NLM gunmen seize 'Iolani Palace, the building where Five-0 is situated, and hold everyone hostage to retrieve Cosi. McGarrett and Danny hide him, until the leader (Henry Ian Cusick) threatens to kill the hostages if they do not surrender. The terrorists kill Cosi, and willingly surrender. McGarrett then learns that NLM leader "El Condor" (Nestor Serrano) has kidnapped Catherine Rollins. To save her, McGarrett has to break the NLM out of custody of new SWAT commander Lou Grover (Chi McBride) which ultimately leaves Grover at odds with Five-0. Later, McGarrett visits Wo Fat before he leaves Hawaii for the reason Doris visited him, and Wo Fat claims she came to apologize for killing his father. Toast later analyses the footage from the destroyed tablet table and the team discover that during the siege the NLM found Adam and Kono's location in Zhejiang, China and sold it to the Yakuza, prompting Chin to call Kono and warn her while also stating that she and Adam should leave right away. Kono and Adam attempt to do so, only to discover that Yazuka members are already at their hideout.
73	2	"Aʻale Maʻa Wau" "Fish Out of Water"	Joe Dante	John Dove	October 4, 2013 (2013-10-04)	402	9.75
Kono and Adam survive a Yakuza assault and escape from their safe house. In Hawaii, Five-0 investigate the murder of a limo driver. They find that before his murder, the driver picked up Texas Ranger Ray Harper (Tim Daly). Harper informs the team that his daughter was kidnapped, and he is after her abductors. During the course of their investigation they learn that Harper's daughter had run away to Hawaii with her boyfriend, 18-year-old Carl Jacobson (it is implied they had sex at one point or another). Carl had actually gone to Hawaii to transport money for some other criminals, but he was robbed. In retaliation, the bosses expecting the money kidnapped Harpers daughter and demanded the money be returned back to them. Carl is wired up and sent in only to learn Harper's daughter/his girlfriend had been sold off to another group. In the meantime, McGarrett learns that former Navy colleague Billy Harrington (Justin Bruening) offered Catherine a job at his private security firm, as she is considering leaving the Navy.
74	3	"Kaʻoia iʻo Ma Loko" "The Truth Within"	Duane Clark	Steven Lilien & Bryan Wynbrandt	October 11, 2013 (2013-10-11)	403	9.24
Married couple Kaylea and Phillip Van Horn are found murdered in their swimming pool, and evidence points towards a professional hit. They later find that one of their artifacts, an emblem of the Royal League, a disbanded secret society, of which Phillip's great-great grandfather was a member, is missing. The team turns to Jerry Ortega (Jorge Garcia), an old friend of Chin's and a conspiracy theorist. He suggests that the killers wanted the emblem as "the key" to find rings smuggled from Italy that are hidden in Hawaii. The team later celebrate Catherine's retirement, and McGarrett enlists Max to procure a special gift for the ceremony.
75	4	"A ia la aku" "From This Day Forward"	Bryan Spicer	Christina M. Kim & David Wolkove	October 18, 2013 (2013-10-18)	404	8.81
Five-0 investigate the shooting death of a wedding crasher, Brad Dixon. McGarrett suspects the runaway bride, Dahlia Swaine (Briana Lane), after video footage shows her scared reaction after seeing the victim, indicating the two had a history. Chin Ho discovers that the victim ran several scams with Dahlia, revealed to be his sister Nicole Dixon, as an accomplice. They later find Nicole, barely alive from an apparent car accident. After she is stabilized, Five-0 learns that someone actually kicked her car over the edge, and evidence points towards her brother trying to kill her. Meanwhile, Kono and Adam capture a Yakuza operative in Hong Kong and learn that the hit has been ordered by Riku Sato, a former ally of Adam's. Together the two learn that Kono is wanted dead as well, and that the hit is not about revenge for Michael Noshimori's death.
76	5	"Kupuʻeu" "Fallen Hero"	Jeffrey Hunt	Moira Kirland & Eric Guggenheim	October 25, 2013 (2013-10-25)	405	9.46
On a routine assignment, Catherine and Billy Harrington witness a hit man killing their subject, John Cutler, and wounds the two, with Billy later dying in hospital from injuries sustained in the gunfight while Catherine survives albeit with an injured left arm. Five-0 return to the house to find it had been cleaned out of any evidence. After finding Cutler's body in his second car, the team learns from his encrypted laptop that he was spying on his wife's security company on orders from a rival company. Five-0 realizes that the company's CEO was responsible for cleaning up the scene, but still agrees to give them all the evidence they gathered although the evidence is later discovered to have been contaminated, further complicating the investigation. Meanwhile, McGarrett asks Joe White (Terry O'Quinn) to track down Doris, only to learn that his mother is active with the CIA again. In Hong Kong, Adam allows himself to be captured for Kono's safety. The team later say goodbye to Billy who is buried with full military honors.
77	6	"Kupouli ʻla" "Broken"	John Terlesky	Sue Palmer & David Wolkove	November 1, 2013 (2013-11-01)	406	9.71
While Max is attending a Halloween party, a police officer shoots a crazed doctor Michael Besner who later infects Max too. Five-0 find traces of a drug that drug cartels use to control their victims. They soon realize that Besner entered a morgue to cut off the head of a corpse, Lisa Mills, who died in a car accident. She was presumed missing a year earlier before she resurfaced, and Five-0 believe that Lisa was kidnapped after finding cameras in her car and apartment. Meanwhile, Catherine finds one of Sato's lieutenants, Hideaki Kuroda (Brian Tee), in Hawaii.
78	7	"Ua Nalohia" "In Deep"	Joe Dante	Story by: John Dove & Noah Nelson Teleplay by: Bradley Paul	November 8, 2013 (2013-11-08)	407	9.51
Five-0 investigate the murder of Bryan Carpenter, but later learn he is Matt Hutchins, who Chin recognises as a former police academy cadet. He was working deep undercover for the ATF to infiltrate a gang of gun runners run by Jason Dekker (Xzibit). After finding $100,000 cash belonging to Hutchins, Danno suspects he turned bad. However, it is later revealed that Dekker loaned him the money, and Hutchins was using it to find a mole in the ATF, who is feeding information on the rival gangs. Meanwhile, during the course of the investigation, Mary (Taryn Manning) returns with her adoptive baby daughter, who the team have to look after while Mary has food poisoning. Elsewhere, Chin and Grover have a meeting at a coffee house, where Grover warns Chin that Steve's behavior could result in alienation from HPD. Catherine captures Kuroda and later learns of Sato's location, after which she officially joins Five-0.
79	8	"Akanahe" "Reluctant Partners"	Jerry Levine	Steven Lilien & Bryan Wynbrandt	November 15, 2013 (2013-11-15)	408	9.90
Kono helps Five-0 minus Danny, who is in New Jersey with his family to celebrate his father turning 60, capture Sato (Louis Ozawa Changchien), who reveals that Adam is not dead. Kono leaves again to find him. Afterwards, Governor Denning (Richard T. Jones) forces Grover and McGarrett to work together to serve an arrest warrant to Ian Wright (Nick Jonas) for unpaid parking tickets. After arriving in his home, the two are ambushed and Ian is kidnapped. Five-0 discover that the kidnappers are professional bank robbers, and Wright is also an expert computer hacker who helped the gang rob a bank. He later taunts McGarrett through messages on a hacked ATM, to which McGarrett replies that he will catch him next time.
80	9	"Hauʻoli La HoʻomaikaʻI" "Happy Thanksgiving"	Allison Liddi-Brown	Eric Guggenheim & Moira Kirland	November 22, 2013 (2013-11-22)	409	9.92
Five-0 investigate the murder of Kyle Russo, a Secret Service agent who is found in a barrel of lye, and learns that the President is visiting Hawaii to participate in a secret meeting with North Korean delegates. They identify the assassin, Dante Barkov (Tom Hintnaus), who is wanted by Interpol. After finding one of his accomplices, it is revealed that the President is not the target, but a young woman, Andrea Hicks, who is in hiding after witnessing a murder in Dallas. Meanwhile, McGarrett's aunt Deb (Carol Burnett) pays a surprise visit for Thanksgiving, where she reveals that she has an inoperable brain tumor and chooses not to seek treatment which leaves Steve devastated. Kono finds a lead to Adam's location in Seattle.
81	10	"Hoʻonani Makuakane" "Honor Thy Father"	Larry Teng	Peter M. Lenkov & Ken Solarz	December 13, 2013 (2013-12-13)	410	9.13
McGarrett stops David Toriyama (James Saito) from killing Ezra Clark (Jack Axelrod), a Pearl Harbor veteran. Toriyama claims that Ezra murdered his father, James Toriyama in 1943 following the internment of Japanese American citizens, including the Toriyamas, in order to steal the family katana, despite the official record that David's father was killed by a fellow internee. Five-0 decide to investigate the claim, where they learn that there was a cover up of the events, but Ezra was not responsible for the murder. Note: This is the first episode to feature Chi McBride as a main cast member.
82	11	"Pukana" "Keepsake"	Bryan Spicer	Bill Haynes	December 20, 2013 (2013-12-20)	411	9.62
Five-0 investigate the murder of a serial burglar, later identified as Victor Dobbs by Kamekona, at the trunk of a car. They find a laptop at his residence containing a list of all the homes Dobbs burgled. As Catherine and Chin search the houses, Five-0 receive a visit from the FBI, who informs them that the murderer is a serial killer who killed at least 14 women after imprisoning them for 24 hours. Chin finds the house where Dobbs was killed, only to be held captive by the owner, Gary Nathan (James Urbaniak), the serial killer, who later kidnaps his girlfriend Emily (Heather Dubrow) when she makes an unexpected visit. Meanwhile, Danny and Grace find a puzzle box washed up on the beach, from Japan after the 2011 tsunami, with a locket and a girl's face in it. The girl is found to have died during the earthquake. Danny and Grace then travel to a temporary housing shelter in Ishinomaki, Japan to return the box to the family's only survivor. Kono's trail to Adam leads her to Vancouver, British Columbia.
83	12	"O kela me keia Manawa" "Now and Then"	Peter Weller	John Dove	January 10, 2014 (2014-01-10)	412	10.74
Five-0 are searching for Jack Anderson (Karl Makinen), a friend of Grover's who is on the run after killing a local gangster outside a bar. The team later discover that Anderson is really Jack Mitchell, a former Green Beret wanted for the manslaughter of the wife of Matt Haley (Zay Harding), a newlywed couple twenty years before. Further evidence reveals that the victim's husband who is in Hawaii ordered a hit out against him. The team must find Mitchell, who has long since disappeared, and the victim's vengeful husband before the situation ends badly. Meanwhile, Danno flirts with a young woman, Amber Vitale (Lili Simmons), at a gas station, only to later rescue her after she was shot while on a drive. Kono reunites with Adam in Vancouver to tell him that he is now free from Yakuza reprisal.
84	13	"Hana Lokomaikaʻi" "The Favor"	Sylvain White	Story by: Peter M. Tassler Teleplay by: Peter M. Lenkov & Ken Solarz	January 17, 2014 (2014-01-17)	413	10.63
Chin Ho is questioned by an Internal Affairs agent (Robert Knepper) about his relationship with Malia (Reiko Aylesworth) and his father's murder in a convenience store robbery 15 years before, which until recently remained unsolved. This ties into a recent discovery of the body of an undercover DEA informant, who was tortured for infiltrating a cartel after the arrival of their boss, Gabriel Waincroft (Christopher Sean), Malia's brother who Chin Ho always suspected of being his father's killer. It is later revealed that Internal Affairs suspects Chin of stealing Waincroft's $25 million, a charge Chin strongly denies.
85	14	"Na hala a ka makua" "Sins of the Father"	Peter Weller	David Wolkove	January 31, 2014 (2014-01-31)	414	11.24
Roy Parish (Michael Madsen) is found guilty of the murder of a real estate manager, but manages to escape from the courthouse. As Five-0 and the Honolulu Police Department start an island-wide search, Parish hides in Danno's car and holds him and McGarrett at gunpoint. He forces them to a construction site to confront the star witness, who Parish claims lied under oath and framed him. Meanwhile, Grace (Teilor Grubbs) gets into trouble when she punches someone at school for picking on one of her friends and Danny must decide how to discipline her when he finds out the reason behind her behavior.
86	15	"Pale ʻla" "Buried Secrets"	Jerry Levine	Moira Kirkland	February 28, 2014 (2014-02-28)	415	10.61
Five-0 investigate the murder of estate agent Guy Ingram, whose mummified remains were found behind the wall of one of the houses he was selling. Ballistics match a weapon used previously that was supposedly confiscated and destroyed. They then realise that one of the employees of the smelter, George Moku, is selling those guns. Meanwhile, reporter Shawn Hutten (Ethan Embry) presses Grover about his past in Chicago. Grover finally confesses to McGarrett about the real reason why he moved to Hawaii. Danno's mother Clara Williams (Melanie Griffith) pays a visit and has some shocking news for her son.
87	16	"Hoku Welowelo" "Fire in the Sky"	Jeffrey Hunt	Steven Lilien & Bryan Wynbrandt	March 7, 2014 (2014-03-07)	416	10.35
A honeymooning couple are gunned down whilst deep sea fishing after they witness a "falling star" crashing into the ocean. A panel of carbon graphite is found impaled on their boat. Jerry Ortega returns to reveal that the couple witnessed the crash of "Black Unicorn",a Chinese stealth satellite. Later, a Chinese Ministry of State Security agent confronts Jerry for the satellite schematics, only for him to turn the tables and taser her. The agent, Zi Chen (Elaine Tan) reveals to Five-0 that she was sent to stop her fiance, Quan Lung, who committed the killings and stole a hard drive from the satellite that would compromise U.S. defenses. Later, McGarrett allows for Jerry to live with him after Jerry believes his home was compromised by the Chinese. Meanwhile, Grover takes Clara on a ride-along.
88	17	"Ma Lalo o ka ʻili" "Beneath the Surface"	Bryan Spicer	Story by: Bill Haynes Teleplay by: Bill Haynes & John Dove	March 14, 2014 (2014-03-14)	417	9.53
The team investigates the apparent murder of school teacher Russell Donovon and the abduction of his daughter Kelly (Conor Leslie). They deduce that the culprit is Tommy Fa'aloa (Booboo Stewart), a troubled young mechanic with a criminal past, and start to believe that Tommy actually rescued Kelly from abuse inflicted by Russell. However, they later realize Kelly was faking the abuse and manipulated Tommy into killing her father to collect his insurance premium. Meanwhile, Danno, with Grace's help, attempts to reconcile his parents. When Jerry finds a polybius square cipher on McGarrett's toolbox, he cracks it as coordinates to a location in Pursat Province, Cambodia. McGarrett is told by CIA agent Sam Connors (James Brennan) that there is a grave in the location.
89	18	"Hoʻi Hou" "Reunited"	Sylvain White	Christina M. Kim	April 4, 2014 (2014-04-04)	418	9.67
Chin Ho and Jerry attend a high school reunion when a classmate, Laura Richmond, is found dead as result of falling onto one of her stiletto heels. Five-0 investigate why she attended the reunion, as she did not attend any of the past ones. They find she paid the medical bills for a Nina Johnson, mother of Cory Johnson, an aspiring surfer who disappeared 25 years ago. It appeared that Laura was seeing Cory while she was in a relationship with another classmate, Alan Kim (Peter Shinkoda). Meanwhile, McGarrett and Danno travel to Cambodia to find the grave has been dug and the body missing. They do find hair, and McGarrett has Max test the hair for DNA, only for the sample to disappear. McGarrett confronts Agent Connors, who invites him to his office later in the episode. When he returns, McGarrett finds the office deserted. A phone rings and the man on the other end warns McGarrett to discontinue his investigation.
90	19	"Ku I Ka Pili Koko" "Blood Brothers"	Maja Vrvilo	Story by: David Wolkove Teleplay by: Steven Lilien & Bryan Wynbrandt	April 11, 2014 (2014-04-11)	419	9.17
Running on a tip of a weapons deal from Jason Dekker, Five-0 and Grover's SWAT team race to a parking garage to intercept the deal, only to find the area abandoned. As the team leave, Danny and McGarrett spots a beaten man in a maintenance room, and then the building suddenly explodes, killing the man and trapping the other two. Catherine gets into contact with McGarrett and locates them both, only to learn that rescue workers cannot get to them and Danny and McGarrett must break themselves free. Meanwhile, Chin Ho and Kono learn that Dekker received the tip from a fellow inmate, known as "Spider", after learning the casualty was his brother. They learn that Spider was bribed to tip off Dekker by an unknown party with the intention to target Five-0. The man paying Spider is Edward Cobb (David Gautreaux), a retired CIA agent operating in Southeast Asia with a questionable record. McGarrett uncovers a surprising link between his mother and Wo Fat.
91	20	"Peʻepeʻe Kanaka" "Those Among Us"	Jeff Cadiente	John Dove	April 25, 2014 (2014-04-25)	420	9.26
Pool cleaner Nico Kane is found shot to death. Five-0 believe he walked into a meth lab run by local university students in one of the houses. However, after they find the student responsible, he chooses to jump to his death than get arrested. It is revealed that he and another student, Brian Miller, were radicalized by a wanted Jihadist hiding in Yemen, who is indoctrinating American students. Steve and Danny later visit a military rehabilitation center in San Diego to inform a Marine that they've captured the two terrorists responsible for the attack in Afghanistan that cost four Marines their lives and left the Marine badly injured.
92	21	"Makani ʻolu a holo malie" "Fair Winds and Following Seas"	Jeffrey Hunt	Story by: Peter M. Lenkov & Ken Solarz & Eric Guggenheim Teleplay by: Eric Guggenheim	May 2, 2014 (2014-05-02)	421	8.77
Five-0 investigate the death of Bruce Paloma, who was transporting a liver to save the life of a patient. The liver is stolen and the team only have 18 hours to find it. They recover it quickly however, and discover the thief was hired by the bosses of Attis, a chemical company that is a target of a lawsuit, to steal the organ who was meant for the lawyer handling the case. Meanwhile, Catherine and McGarrett venture to Afghanistan to find Najib Khan, a boy who is captured by the Taliban. Catherine reveals the seven years before, she was wounded and separated from her group, where she was rescued by Najib's father Amir (Mido Hamada). The couple find Amir wounded in a field, and he reveals that his son was taken by Umar Hassan (Farshad Farahat), a terrorist who was thought to have been killed by American forces. Catherine and McGarrett soon track a convoy and find several captured children, but Najib is not one of them. Furthermore, McGarrett is captured by insurgents with connections to the terrorist ring Five-0 had taken down in the previous episode. Catherine calls Danno for help, who travels to Afghanistan to warn the military of the situation. A team of Navy SEALs find the compound and save McGarrett before he can be executed. McGarrett escapes being court-martialed and is let off with a severe reprimand. Catherine however, chooses to stay in Afghanistan to continue looking for Najib and heads off into the sunset after saying her final goodbyes to a heartbroken Steve. Note: This is the last episode to feature Michelle Borth as a main cast member.
93	22	"O ka PiliʻOhana ka ʻOi" "Family Comes First"	Bryan Spicer	Peter M. Lenkov & Ken Solarz	May 9, 2014 (2014-05-09)	422	9.21
Five-0 hear that Wo Fat has escaped from the supermax prison in Colorado by bombing a hole in the wall to his cell. Furthermore, Doris has visited Wo Fat twice within the month of his escape. Meanwhile, Grover learns that his daughter Samantha (Paige Hurd) is kidnapped by the hacker Ian Wright (Nick Jonas), and is instructed to steal SWAT gear for a gang of mercenaries to steal $100 million of confiscated drug money to be used for Third World development that Five-0 is transporting. Desperate to save Samantha, Grover decides to walk into the compound carrying a bomb and threatening to detonate it if he is not given the money. Grover receives a call and hears that Samantha has been released, and Ian was murdered by Wo Fat, before releasing Samantha to relay a message to McGarrett that the two should talk soon. For his actions, Grover is forced to take early retirement from the Honolulu Police Department, but later accepts McGarrett's offer to join the Five-0 task force.

Season 5 (2014–15)

Main article: Hawaii Five-0 (2010 TV series, season 5)

No. overall	No. in season	Title	Directed by	Written by	Original air date	Prod. code	U.S. viewers (millions)
94	1	"Aʻohe Kahi e Peʻe Ai" "Nowhere to Hide"	Bryan Spicer	Peter M. Lenkov & Ken Solarz	September 26, 2014 (2014-09-26)	501	8.97
Five-0 investigate the deaths of two tourists who were hiking on the mountains, and find that the culprit is an unmanned aerial vehicle fitted with automatic weapons. The drone was stolen from a military contractor. As the drone attacks a beach crowd, the streets of Honolulu are evacuated in anticipation of further attacks, with Jerry Ortega (Jorge Garcia) has a plan to hack into the drone. In the meantime, Danny Williams (Scott Caan) and Steve McGarrett (Alex O'Loughlin) attend a mandatory psychological evaluation. Adam Noshimuri (Ian Anthony Dale) proposes to Kono (Grace Park). Jerry suspects a vintage bookshop owner of counterfeiting money, and the owner tells a partner that they have to deal with Jerry. Danny learns from Marco Reyes (Anthony Ruivivar) that his brother Matt has been captured, and Danny has to pay back the money Matt had stolen from his captors. Note: This is the first episode to feature Jorge Garcia as a main cast member
95	2	"Ka Makuakane" "Family Man"	Sylvain White	Steven Lilien & Bryan Wynbrandt	October 3, 2014 (2014-10-03)	502	9.77
When Sophie Larkin is kidnapped during her school recital, Five-0 initially suspect that it involves her Navy SEAL father who is on a secret mission in Afghanistan. After the Navy assures the team that there are no security breaches, they realize the kidnapper took the wrong girl when Eric Porter (William Mapother), a father of another girl from the school receives a call demanding $1.6 million. Meanwhile, Marco Reyes reveals to Danny that Matt stole $18.5 million from him. Reyes wants Danny to bring back the money believing he has it.
96	3	"Kanalu Hope Loa" "The Last Break"	Joe Dante	Sarah Byrd	October 10, 2014 (2014-10-10)	503	9.19
Three young surfer women (Allie Gonino, Sonya Balmores and Sumire) rob a tour bus, and end up killing a tourist, businessman Nathan Wagner. Evidence suggests that Wagner was targeted, and Kono goes undercover as a surfer. It later surfaces that a conwoman who was after Wagner's wealth is after the surfer thieves as well. Meanwhile, Jerry is investigating antique book seller Thomas Farrow (Greg Ellis), suspecting him of running a counterfeiting ring. Although Farrow was cleared by the authorities, Jerry enlists the help of Kamekona (Taylor Wily). Also, Danny finds the money Marco Reyes was after in a remote area.
97	4	"Ka Noeʻau" "The Painter"	Peter Weller	Peter M. Lenkov & Ken Solarz	October 17, 2014 (2014-10-17)	504	9.18
Joseph Stegner, hitman working for the Bagosa crime family arrives in Hawaii from Detroit. Five-0 quickly apprehend Stegner, but he is killed by a sniper. The team learn that the suspect is Nick Mercer (Timothy V. Murphy), another hitman under Bagosa's employ. Mercer claims that after he had his heart replaced, he had a change of perspective and decided to run his own Witness Protection Program, by helping Bagosa targets into hiding in a camp in Molokaʻi rather than kill them. Mob boss Albert Bagosa (Carmen Argenziano) has ultimately learned of Mercer's betrayal and is flying to the island with five more hitmen to finish the job. Meanwhile, Danny finds out he is $5.5 million short. At the risk of his career, Chin Ho Kelly (Daniel Dae Kim) gets the rest of the money from his father's killer and former brother-in-law Gabriel Waincroft (Christopher Sean). Danny and McGarrett deliver the money to Reyes only to discover that Matt was dead the entire time. In response, a grief-stricken Danny kills the henchmen before killing Reyes.
98	5	"Hoʻoilina" "Legacy"	Bryan Spicer	Eric Guggenheim	October 24, 2014 (2014-10-24)	505	8.92
McGarrett visits his father's grave on the anniversary of his death, and encounters Ellie Clayton (Mirrah Foulkes), a state prosecutor who also visited his grave. McGarrett learns that Ellie was the daughter of Paul Clayton, who was killed 20 years ago in a supposed robbery gone wrong. John investigated the case which is still unsolved, and the two became close until John's death. McGarrett decides to reopen the case. Jerry continues to investigate Thomas Farrow despite multiple warnings from both McGarrett and Chin. Note:Danny is absent in this episode as he has brought his brother's body home from Colombia.
99	6	"Hoʻomaʻike" "Unmasked"	Joe Dante	Story by: David Wolkove Teleplay by: Steven Lilien & Bryan Wynbrandt	October 31, 2014 (2014-10-31)	506	9.47
Danny returns from his brother's funeral and it is revealed that Matt was dead before Marco arrived on Oahu in Aʻohe Kahi e Peʻe Ai. Chin, Grover, and Kono, investigate a murder victim who was found in a freezer on Halloween night. When a second body is found in a similar fashion, Max (Masi Oka) discovers that the killer is copying the events of Jack Knife, a 1984 horror film in which the killer was killing the students who bullied him. Meanwhile, Farrow interrogates Jerry, and then lets him go. Danny and McGarrett start believing Jerry's claim, but Farrow uses steps to avoid arrest by cleaning Jerry's basement and his home. Jerry discovers that Farrow is an alias of a British Special Forces operative, named William Corrigan, who was dishonorably discharged for attacking a suspected rebel village against orders. Farrow was counterfeiting money to aid the I.R.A.
100	7	"Ina Paha" "If Perhaps"	Larry Teng	Peter M. Lenkov	November 7, 2014 (2014-11-07)	507	8.95
When McGarrett goes missing, the rest of Five-0 begins searching for him. With the help of Sang Min (Will Yun Lee), the team learns that Wo Fat (Mark Dacascos) kidnapped him. Wo Fat tortures McGarrett for the whereabouts of his father. Wo Fat drugs Steve, causing the latter to believe he's back in September 2010 where Victor Hesse (James Marsters) is arrested before he can kill Steve's father, John (William Sadler). The team also lead different lives where, as a result of Five-0 never existing, Kono is a world champion surfer, Chin was never investigated by Internal Affairs, Max is an ER doctor, Kamekona never goes legit and ends up in prison, Grover is a tourist, Jerry is a mentally ill vagrant, Danny is still happily married to Rachel and embraced the move to Hawaii, and Jenna Kaye is looking for her boyfriend who was in a motorcycle accident. Back in reality, McGarrett learns that Doris took in and raised Wo Fat for years after his mother's death until she was forced to let him go and Wo Fat considers Steve a brother. McGarrett breaks free and a final showdown with Wo Fat erupts between the two, ending with McGarrett shooting him in the head, killing him.
101	8	"Ka Hana Malu" "Inside Job"	Jerry Levine	Moira Kirland	November 21, 2014 (2014-11-21)	508	10.07
Five-0 investigates the murder of David and Kate Kealoha. David was an investor who was about to be arrested for embezzling from his clients. The team suspect both his sons Jake (Nathan Kress) and Travis (Charlie Carver) to be behind the murder when their pet dog reacts violently to their presence. Travis flees, where Chin and Kono follow him to a motel. It is revealed that both sons were not involved, and Travis was covering up a relationship with his best friend's mother Patti Gabel (Josie Davis). Meanwhile, McGarrett's aunt Deb (Carol Burnett) returns to Hawaii to marry her fiancé, Leonard Cassano (Frankie Valli), who is terminally ill with cancer. Jerry discovers that Leonard was a lawyer who represented a New York City mafia family and was suspected to have destroyed evidence that would convict his client. Leonard later confronts McGarrett to explain to him that he never destroyed the evidence, but secretly kept it. He hands it to McGarrett, who decides to wait "a couple of months" before handing it to the New York District Attorney's office.
102	9	"Ke Koho Mamao Aku" "Longshot"	Bryan Spicer	Sue Palmer	December 12, 2014 (2014-12-12)	509	8.77
Rodeo bull rider Keone Maka is found poisoned in a desert on the Big Island, which NASA uses to test Mars rovers. Max reluctantly joins forces with Dr. Sanjeet Dhawan (Ravi Patel), the Hawaii Island Medical Examiner, with whom he has been feuding for several years. Meanwhile, Officer Pua attempts to bring Steve and Danny to justice for cutting down a Christmas tree on a protected forest reserve. Pua eventually catches Danny with the Christmas tree and fines him $1200, but decides not to take away the tree until after Christmas.
103	10	"Wawahi moeʻuhane" "Broken Dreams"	Sylvain White	Story by: Peter M. Lenkov Teleplay by: Steven Lilien & Bryan Wynbrandt	January 2, 2015 (2015-01-02)	510	10.51
Five-0 investigate the murder of Brooke Waiakea, a hula dancer, later discovering that the dance studio is a front for an escort agency. The victim reminds Dr. Shaw (Amanda Setton), Max's intern, of a past case. The team turn to the aid of Harry Brown (William Forsythe), a former HPD detective-turned-private investigator, who was helping Brooke take down the escort agency.
104	11	"Uaʻaihue" "Stolen"	Jeffrey Hunt	David Wolkove	January 9, 2015 (2015-01-09)	511	11.50
Bryan Wallace (Gerald Downey), a recently out-of-work consultant, sends his family on vacation from Michigan, but is sent to the hospital after being shot. The shooter is revealed to be Lukas Janssen (Henri Lubatti), an elusive art thief who stole a Vincent van Gogh painting and planted it in Bryan's luggage to avoid suspicion. The investigation is assisted by Nicole Booth (Rebecca Mader), an art thief who steals stolen art for money. She also happens to be an outlaw, with a criminal record and series of arrest warrants issued on her already, which comes to Steve's knowledge by Jerry's secret investigation.
105	12	"Poina ʻOle" "Not Forgotten"	Brad Tanenbaum	John Dove	January 16, 2015 (2015-01-16)	512	10.59
Neurosurgeon Christine Dupont (Sarah Jane Morris) is killed. Five-0 investigate and soon realize that it has nothing to do with Delano, after they find one of her former patients dead. The patient was an employee at a local reformatory where four young boys disappeared in 1974. Meanwhile, McGarrett's father's car is stolen and later found in a disassembled state. McGarrett finds the thief, homeless young man Nahele Huikala (Kekoa Kekumano). McGarrett becomes sympathetic of Nahele and decides to help him. Grover's daughter, Samantha (Paige Hurd) continues to have nightmares of her kidnapping.
106	13	"Lā Pōʻino" "Doomsday"	Maja Vrvilo	Story by: Peter M. Lenkov Teleplay by: Sarah Byrd	January 30, 2015 (2015-01-30)	513	10.50
Joe White (Terry O'Quinn), now a private security contractor, reunites with McGarrett and aids in the transfer of Mitch Lang, who has contracted a new deadly strain of bird flu in the Philippines. However, during the transfer, Lang is hijacked by terrorists. Five-0 believe that it was linked to a hacking on Homeland Security's database, and the terrorists intend to weaponize the new strain by implanted it on bees, which would spread the virus worldwide. In the meantime, Joe confides in McGarrett that his mother is off the grid and promises to find her together. Regardless, McGarrett has Danny spy on him.
107	14	"Powehiwehi" "Blackout"	Peter Weller	Story by: Travis Donnelly Teleplay by: Eric Guggenheim	February 6, 2015 (2015-02-06)	514	10.08
JC Dekker (Xzibit) is shot while attempting to break into prison, but he does not remember anything for the three days leading up to that event. The team learn that Dekker is a confidential informant for Immigration and Custome Enforcement to bring down Roman Zednik, an infamous Bulgarian criminal no law enforcement has ever seen in person. Meanwhile, Kono gets into an argument with Adam over the fact that she still hasn’t accepted his proposal.
108	15	"E ʻImi pono" "Searching for the Truth"	Allison Liddi-Brown	Kenny Kyle	February 13, 2015 (2015-02-13)	515	9.81
Journalist Julius Brennan (A. J. Buckley) is murdered during Chinese New Year. Brennan was covering a genocide in the Congo perpetrated by warlord Roko Makoni (Barkhad Abdi), who was believed to have been killed in an air strike. Elsewhere, Danny learns that his daughter Grace might have a potential boyfriend, when her texts are accidentally forwarded to his phone.
109	16	"Nanahu" "Embers"	Joe Dante	Story by: Akeba Gaddis Lynn Teleplay by: John Dove	February 20, 2015 (2015-02-20)	516	10.66
Five-0 work together with California-based Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) agent Kathy Millwood (Melina Kanakaredes) to investigate a series of arson attacks against couples. McGarrett learns that Millwood was not authorized to run the investigation, and that similar arson attacks were committed in California, with one killing Millwood's husband. Meanwhile, Danny takes his girlfriend Amber Vitale (Lili Simmons) on a romantic getaway, but it is cut short when Amber is tracked down by her abusive ex-husband Frank Simpson (David Hoflin) after she left him in New York. Danny is stabbed as he tackles Frank. Elsewhere, Grover and McGarrett practice for a charity golf tournament, and Michelle Wie ends up offering McGarrett some helpful advice.
110	17	"Kukaʻawale" "Stakeout"	Daniel Dae Kim	David Wolkove & Lorenzo Manetti	February 27, 2015 (2015-02-27)	517	9.79
A couple robs a jewelry store and steal $3 million worth of diamonds. The woman, Emma Mills (Jessica Lowndes) shoots her male accomplice Jacob Anders (Zoltán Hayth) and leaves him for dead, but his body has not been found. Believing Anders intends to get revenge on Mills, Danny and McGarrett stake out her apartment to wait for him. Meanwhile, Danny and McGarrett go on another round of therapy and are told to be more caring to each other.
111	18	"Pono Kaulike" "Justice for All"	Larry Teng	Peter M. Lenkov & Ken Solarz	March 6, 2015 (2015-03-06)	518	9.54
U.S. Marshals arrest Danny for Marco Reyes' murder, while IA arrests Chin for conspiracy to commit Reyes' murder. Joe reveals to the rest of the team that Reyes was a CIA asset and they want Danny to pay for his death. Danny signs the extradition form to be transported to a Colombian prison when Marshal Sam Alexander (Raphael Sbarge) implies his family will be in danger if he does not. McGarrett later learns that the CIA was getting close to making a deal with Reyes to get access to $1.3 billion of cocaine in his possession and with Reyes dead, the location of the drugs is unknown. McGarrett offers to find the cocaine for Alexander. McGarrett later realizes that his mother was Joe's source, and that she is the reason McGarrett was not arrested for his involvement too. Meanwhile, Chin realizes that Gabriel Waincroft has tipped off IA about Chin's involvement in exchange for transfer to a minimum security prison. However, Gabriel uses this as an opportunity to murder IA detective Rex Coughlin (Robert Knepper) and escape. Now with no case against him, Chin is released. He later gets a call from Gabriel, who merely tells him "you're welcome".
112	19	"Kahania" "Close Shave"	Jerry Levine	Steven Lilien & Bryan Wynbrandt	March 13, 2015 (2015-03-13)	519	9.38
As McGarrett spends the morning getting a shave from a barber acquaintance Odell Martin (Michael Imperioli), a wounded young man, Eran (Steven Krueger), stumbles in, claiming to be fleeing from an Armenian gang led by the ruthless Garig Dobrian (Mark Ivanir) after witnessing a murder. Moments later, the same gang arrives and surrounds the shop. McGarrett, Eran and Odell barricade themselves inside to wait for help. Meanwhile, Jerry is falsely accused of a series of home invasions. As Max provides an alibi for Jerry's whereabouts, Chin and Grover investigate the home invasion and learning the thief is targeting divorced women.
113	20	"ʻIke Hanau" "Instinct"	Maja Vrvilo	Story by: Peter M. Lenkov & Peter M. Tassler Teleplay by: Moira Kirland & Eric Guggenheim	April 3, 2015 (2015-04-03)	520	8.87
Grover's oldest and closest friend Clay Maxwell (Mykelti Williamson) and his wife Diane (Kim Wayans) vacation in Hawaii, but one morning, Clay calls Grover to tell him that Diane fell off a cliff to her death. Grover's instinct tells him that Clay pushed her. The rest of Five-0 are skeptical however, and Max has rules Diane's death as accidental as there is no evidence suggest otherwise. However Grover promises to find evidence that shows Clay is guilty. Meanwhile, Danny and Shaw are trapped in an elevator with the dead body of Glenn Hurd, where Danny reveals he has claustrophobia.
114	21	"Ua heleleʻi ka hoku" "Fallen Star"	James Wilcox	David Wolkove	April 10, 2015 (2015-04-10)	521	8.70
Jerry and Max attend an Elvis impersonation convention when during a performance one of the Elvises, Lane Collins, collapses and dies. Max determines the death as cyanide poisoning. Five-0 discover that he was poisoned by crazed fan Jane Miller (Calico Cooper). After the case is closed, gunmen break into the ME's office and steal Collins' body. This then relates back to the episode where the jewels were stolen and never recovered. Meanwhile, Gabriel stalks Chin and asks him to smuggle him out of Hawaii. When Chin returns to his home, he finds Gabriel left behind pictures of Adam Noshimuri.
115	22	"Hoʻamoano" "Chasing Yesterday"	Stephen Herek	John Dove	April 24, 2015 (2015-04-24)	522	8.35
Three middle-aged men on vacation, Nolan Fremont (Jaleel White), Jake Lockhard (Pauly Shore), and Micky Dickson (Kevin Farley), wake up hungover to find a dead woman in their hotel bathtub. When they are arrested trying to bury the body, McGarrett, Danny, and Grover find the men cannot remember the previous night, so they retrace their steps, eventually identifying the victim as Rebecca Oleana, a nightclub waitress. Meanwhile, while Jerry delivers for Kamekona, he witnesses a woman kidnapped in broad daylight. When the car is later found with the kidnapper dead, Chin and Kono work the case and find that the "kidnapper" was the woman's accomplice, the woman is Natalie Morris, who is wanted by the FBI.
116	23	"Moʻo ʻolelo Pu" "Sharing Traditions"	Eagle Egilsson	Story by: Peter M. Lenkov and Ken Solarz Teleplay by: Jessica Granger	May 1, 2015 (2015-05-01)	523	8.60
Kono sets sail on an outrigger canoe to circumnavigate the islands, only for a severe storm to pass and leaving her stranded at sea. She is forced rely on survival skills taught to her by her mother Nani (Catherine Haena Kim). The rest of Five-0 investigate a series of pharmacy robberies where hoards of drugs which can be used to produce methamphetamine is stolen. The suspect claims he is forced to keep making the drug as his son’s life is threatened.
117	24	"Luapoʻi" "Prey"	Maja Vrvilo	Eric Guggenheim	May 8, 2015 (2015-05-08)	524	8.57
As they prepare for Kono's wedding, Five-0 investigates the murder of a bounty hunter who was pulled over by an HPD officer. A man was in the trunk and injured the police officer, that had pulled the hunter over, killed the bounty hunter, and escaped in the car. It later turns out that the man killed a young girl in New York and her father pays a different bounty hunter to capture and turn over the man. Five-0 must find the father before more people die. Later, Danny meets his ex-wife Rachel who has a secret to confess to him Charlie is his son, who has a serious illness. Also, Chin is concerned that Adam might have returned to his old ways.
118	25	"A Make Kāua" "Until We Die"	Bryan Spicer	Story by: Peter M. Lenkov Teleplay by: Steven Lilien & Bryan Wynbrandt	May 8, 2015 (2015-05-08)	525	8.27
In North Dakota, a weapon convoy is hijacked by an unknown group. The man leading the group, hijacks a plane and forces the pilot to fly to Hawaii. Traces of radioactivity is later found on the plane. As the team prepares for Kono's wedding to Adam, a nuclear bomb is spotted in Waikiki. The team are afraid that it will blow up the city and maybe the rest of Hawaii, so Danny and Steve take it using Kamekona's helicopter and drops it into the ocean. McGarrett, meanwhile, deals with his own issues as Catherine returns from Afghanistan. At the wedding, Chin forgets the wedding rings and goes to his car to get them where he is faced by Gabriel Waincroft. Chin tells him that he should shoot him while he has the chance. Some seconds later, Gabriel has mysteriously vanished, leaving Chin confused.

Season 6 (2015–16)

Main article: Hawaii Five-0 (2010 TV series, season 6)

No. overall	No. in season	Title	Directed by	Written by	Original air date	Prod. code	U.S. viewers (millions)
119	1	"Mai ho`oni i ka wai lana mālie" "Do Not Disturb the Water That Is Tranquil"	Bryan Spicer	Peter M. Lenkov & Eric Guggenheim	September 25, 2015 (2015-09-25)	601	8.30
While Kono Kalakaua (Grace Park) and Adam Noshimuri (Ian Anthony Dale) are away on their honeymoon, the remainder of Five-0 investigate the murder of a researcher who was investigating a piracy incident in Oahu in 1884, where artifacts were stolen from King Kalākaua that has since become a local legend. After the killer steals a painting from a museum, the only recovered artifact, he takes a hostage and disappears. It is revealed that the hostage and the killer are working together as modern day pirates. Steve McGarrett (Alex O'Loughlin) tells Danny (Scott Caan) that he is considering proposing to Catherine (Michelle Borth). Meanwhile, Gabriel Waincroft (Christopher Sean) holds Kono and Adam captive demanding Adam relinquish his assets. After Adam eventually gives in, he and Gabriel go to a bank. Kono manages to escape to stop Gabriel, but Gabriel wounds Adam to ensure his escape. With Adam's money gone, he has no means to pay the Yakuza to keep them alive.
120	2	"Lehu a Lehu" "Ashes to Ashes"	Sylvain White	John Dove	October 2, 2015 (2015-10-02)	602	9.24
A bomb squad is attacked following a tip of a briefcase bomb. When another briefcase is left abandoned at a local news station, Five-0 discovers that it contains a flash drive containing a ransom to release serial arsonist Jason Duclair (Randy Couture) or another bomb will detonate. The bomb was set by Jason's believed protégé however it's later revealed he only wanted to kill Jason so he could have more fame. Meanwhile, Adam is released from hospital and recovers with Kono, but they are quickly stalked by the Yakuza. Kono later confronts their car to see the gangsters dead.
121	3	"Ua 'o'oloku ke anu i na mauna" "The Chilling Storm Is on the Mountains"	Joe Dante	Story by: Peter M. Lenkov Teleplay by: Steven Lilien & Bryan Wynbrandt	October 9, 2015 (2015-10-09)	603	8.97
Diver and artist Ben Lahineha is found shot in the ocean while gathering lost objects on coral. Five-0 find that ballistics match the murder of a John Doe weeks before. Meanwhile, Danny gets his nephew Eric Russo (Andrew Lawrence) a job with the crime lab, and Jerry is given his own office in the basement. McGarrett prepares to propose to Catherine, but she dumps him with a lie.
122	4	"Ka Papahana Holo Pono" "Best Laid Plans"	Maja Vrvilo	Eric Guggenheim & David Wolkove	October 16, 2015 (2015-10-16)	604	9.08
While Danny is recovering from a bone marrow transplant to his son, the rest of the team investigate the death of Harrison Crane (Keith A. Kirksey), a reclusive millionaire who disappeared 20 years ago, who was found in the jungle with Moesley's counterfeit money. Meanwhile, Adam is captured by Tom Bishop (Steve Bastoni) of the Yakuza and is forced to torture Aaron James for Gabriel Waincroft's location. When Aaron is revealed to not know anything, Bishop executes him.
123	5	"Ka 'alapahi nui" "Big Lie"	Eagle Egilsson	David Wolkove & Sue Palmer	October 23, 2015 (2015-10-23)	605	8.60
Lawyer Kevin Harper is killed in front of his wife and daughter by a hitman riding a motorcycle during a deposition looking into his embezzlement of company funds. Harper was ready to admit that he embezzled money to pay for protection money for the Samoan mafia, and the team believe they were silencing him. Meanwhile, McGarrett receives a mysterious phone call from an unknown location, thinking it might be Catherine. Also, the team enters in a Tough Mudder race.
124	6	"Na Pilikua Nui" "Monsters"	Joe Dante	Matt Wheeler	October 30, 2015 (2015-10-30)	606	8.35
On Halloween, Five-0 investigate the discovery of a briefcase with a number of similar looking female corpses with missing body parts. The team suspect the killer to be Mark Sheppard (Michael Graziadei), an ex-con obsessed with the occult, and one of the victim's ex-boyfriend, but is ruled out when he is found attempting suicide. Meanwhile, a blood bank is robbed by a local gang while Jerry gives blood. Chin and Kono find the thieves took a rare blood type and start looking at pet clinics suspecting the thieves are hiding in one. Danny discovers that Grace went to a party in the North Shore and comes to pick her up.
125	7	"Na Kama Hele" "Day Trippers"	Hanelle Culpepper	Ken Solarz	November 6, 2015 (2015-11-06)	607	8.85
McGarrett goes on a first date with Lynn (Sarah Carter), and they go exploring a small island together. After the two come across an abandoned plane in the jungle, they are ambushed by a gunman. After McGarrett subdues him, he and Lynn explore the plane to discover that it was a prison transport plane that held Dennis Logan (James C. Burns), a crime boss from Boston who was believed to have been killed in a plane crash four years ago. Meanwhile, Chin, Kono, and Grover attend a college football game where the star player Jesse Frontera (Jake Nutty) is lacking in his performance. A suspicious Chin soon discovers that Jesse is being forced to throw the game or his kidnapped father will be killed.
126	8	"Piko Pau 'iole" "The Artful Dodger"	Joel Surnow	Story by: Peter M. Lenkov Teleplay by: Steven Lilien & Bryan Wynbrandt	November 13, 2015 (2015-11-13)	608	8.47
San Francisco Police Department Inspector Abby Dunn (Julie Benz) works with Five-0 to learn and set up a similar task force in her city. The team investigate the murder of a con-woman and suspect her partner, Hank Weber (Kristoffer Polaha), who claims to be targeted as well. Five-0 work with him to catch the killer, but it is revealed to be a trap to let Hank install a virus on Five-0's tablet table. Hank eventually reveals that he was hired to do this by Gabriel Waincroft. Meanwhile, Adam is kidnapped by Tom Bishop to be escorted to Yakuza leader Goro Shioma (Akira Hirayama). Adam kills his captors and escapes, but is quickly recaptured and sent to Goro, where he learns that his debt has been paid, by Waincroft. Dismayed at the knowledge he killed two people for no reason, he turns himself into the police, with Kono witnessing his confession.
127	9	"Hana Keaka" "Charade"	Bobby Roth	Carmen Pilar Golden	November 20, 2015 (2015-11-20)	609	9.10
The body of university professor Elliot Thomas is found being fed to pigs and Max determines he was shot. As Jerry is given the task to wait for the pigs to defecate the bullet, Danny and Eric are enlisted to go undercover as a stand-in professor and student respectively to find the killer. Meanwhile, Chin bonds with Inspector Dunn during her stay in Hawaii. Hank Weber is found dead. Kono tells the team that the prosecutors do not believe that Adam killed the two Yakuza members in self-defense and that he is willing to accept a two-year sentence. Also, Nahele (Kekoa Kekumano), a street kid under McGarrett's charge, learns his father has been released from prison and has recovered custody rights. Nahele reveals he does not want to return to his father, because as a child he witnessed his father murder a man.
128	10	"Ka Makau kaa kaua" "The Sweet Science"	Bryan Spicer	John Dove	December 11, 2015 (2015-12-11)	610	8.13
Ben Nakano, brother of local boxer Luke Nakano (Lewis Ten), is found beaten to death on the day before Luke is to fight opponent Devon Haynes (Harold House Moore) for welterweight champion. The team suspect Juru Katsu (Kelemete Misipeka), a known associate of Gabriel Waincroft, who’s determined to take over the island’s criminal underworld by eliminating several crime bosses. Meanwhile, Adam and Kono spend the former's last day of freedom before he starts his 18-month sentence in Halawa prison.
129	11	"Kuleana" "One's Personal Sense of Responsibility"	Sylvain White	David Wolkove	January 8, 2016 (2016-01-08)	611	9.41
Flashbacks reveal Kamekona's (Taylor Wily) past as a drug pusher for a local gang, and his first encounter with Chin, ultimately becoming his confidential informant to help arrest the gang. In the present, one of those members is found dead as another, Levi Sosa (Maurice Compte) is released from prison. Chin, Kono and Lou ask Kamekona to go undercover to find out who the killer is. Meanwhile, McGarrett and Danny go to Maui where McGarrett realizes he accidentally signed them up for couples' counseling. Adam receives an unexpected visit from Gabriel Waincroft while he is in prison.
130	12	"Ua ola loko i ke aloha" "Love Gives Life Within"	Maja Vrvilo	Story by: Steve Douglas-Craig Teleplay by: John Dove & Eric Guggenheim	January 15, 2016 (2016-01-15)	612	9.48
A teenager is shot while on a camping trip, which leads Five-0 to investigate the theft of old unstable Japanese World War II bombs stolen from a hidden bunker. Meanwhile, McGarrett's Aunt Deb (Carol Burnett) comes back to Hawaii after her husband Leonard passes away and reveals she is close to death and has a list to do before she dies. Also, Chin and Inspector Dunn take their romance to the next level.
131	13	"Umia Ka Hanu" "Hold The Breath"	Stephen Herek	Peter M. Lenkov & Eric Guggenheim	January 22, 2016 (2016-01-22)	613	10.07
Lou travels to Chicago to try to get his ex-partner Clay Maxwell (guest star Mykelti Williamson) to confess to killing his wife. Meanwhile while trying to win a bet with McGarrett and Danny, Kono and Chin are held hostage by two gunmen who are trying to bury a body of a fellow police officer.
132	14	"Hoa 'inea" "Misery Loves Company"	Peter Weller	Matt Wheeler	February 12, 2016 (2016-02-12)	614	8.88
Launa Cruz is shot, and Five-0 later find a connection between her, another woman named Natelie Jacobs and Jack Cruz, Launa's husband. As Five-0 continue their investigation, they share sides of unlucky experiences during Valentine's Day period. On February 16, on Stakeout day; the team finally gets Danny to tell his Valentine's story that involved Melissa. Following the case, the rest of the Five-0 teams makes McGarrett tell his Valentine's story. Jerry gets his first date; Lou and his wife Renee get a dinner made by Chef and McGarrett is revealed to delete Catherine from his phone contacts. Kono is left watching footage from her wedding with Adam, but still holds a smile. Chin gets a call from Abby, who apologizes for her behavior that ruined their Valentine's Day. Despite her saying she is in San Francisco, she is revealed to be sitting in a car on a mountain top in the outskirts of Oahu.
133	15	"Ke Koa Lokomaika'i" "The Good Soldier"	Bryan Spicer	Carmen Pilar Golden & Sue Palmer	February 19, 2016 (2016-02-19)	615	8.86
Five-0 teams up with a man named Neil Palea (Joe Egender) who has autism holds clues to the murder of his friend. They later find out the case is related to an attempted bank robbery with the thieves being hunted and executed by Chin's brother-in-law, Gabriel Waincroft. Chin and Gabriel have a fight, culminating in Chin throwing Gabriel out of a window three stories to the roof of a car. However, Gabriel still manages to escape before Five-0 can arrest him. Meanwhile, Danny and his mother, Clara, (Melanie Griffith) are questioned by the FBI about Matty, but Danny deduces that it was all a ruse to get Danny to admit that the team uses Five-0 resources for illegal purposes. Danny leaves in disgust, and it is revealed that Abby is an FBI agent who is there to arrest Five-0 the next time they cross the line.
134	16	"Ka Pohaku Kihi Pa'a" "The Solid Cornerstone"	Jerry Levine	Story by: Peter M. Lenkov Teleplay by: Steven Lilien & Bryan Wynbrandt	February 26, 2016 (2016-02-26)	616	8.30
Five-0's confidential informant Sang Min (Will Yun Lee) is accused of murdering one of his criminal partners. Sang Min reveals that he was set up when the police arrived. McGarrett seeks the help from his old friend Odell Martin (guest star Michael Imperioli) to help defend Sang Min from the charges because he believes that he's innocent. Elsewhere, Danny travels to New Jersey with his mother Clara to retrieve the money that Danny's brother stole before he was killed and bring it to the FBI.
135	17	"Waiwai" "Assets"	Maja Vrvilo	Eric Guggenheim	March 11, 2016 (2016-03-11)	617	7.97
Five-0 investigates the murders of two hospital surgeons and the patient they were about to operate on. They determine that the patient was the real target as Max shows them X-Rays where a small object was embedded in his skin recently. The vic was actually a mule, carrying a flash drive with NSA intel to Hong Kong for someone else. Meanwhile, Danny returns from New Jersey and informs the rest of the team that the man after them is Robert Coughlin (Ingo Rademacher), Rex Coughlin's brother. Chin and Grover relate Rex's history to Abby: that he tried to bring Chin down on anything and even struck a deal with Gabriel Waincroft to do it. They believe that Robert is after them because of Rex's death. Abby informs Robert that she doesn't think Five-0 is corrupt, but she is told to get something on Five-0 and stay undercover or she'll be fired. At the end of the episode, Abby confesses to Chin that she is a snitch and what kind of a traitor and double agent she is.
136	18	"Kanaka Hahai" "The Hunter"	Eagle Egilsson	Story by: Travis Donnelly Teleplay by: Matt Wheeler	April 1, 2016 (2016-04-01)	618	8.45
Danny's day off with Grace and Charlie starts off bad when Grace is unhappy about being without her phone, but it quickly gets worse when the camaro is stolen. Meanwhile, the team investigates the death of a man found floating in the sea with his friend. Five-0 determines that the men were slaves aboard a fishing vessel. Meanwhile, in the aftermath of her confession, Abby leaves SFPD and McGarrett offers her an extended stay on the Five-0 task force, an invitation that Abby accepts, pleasing Chin.
137	19	"Malama ka Po'e" "Care For One's People"	Brad Tanenbaum	Ken Solarz & Bill Haynes	April 8, 2016 (2016-04-08)	619	8.63
Lou is forced to go off the grid when his, and his family's, lives are threatened because of an undercover assignment Lou did for the FBI in the past, which has inevitably caught up with him. McGarrett, Kono and Chin launch an investigation into Lou's disappearance and it's revealed to be a hit organized by Lou's former best friend Clay, currently in prison, as revenge on Lou for having him sent to prison for the murder of his wife. A race against the clock begins to save Lou and his family.
138	20	"Ka Haunaele" "Rampage"	Jerry Levine	Story by: Steven Lilien & Bryan Wynbrandt Teleplay by: Sean O'Reilly	April 15, 2016 (2016-04-15)	620	8.34
The team investigates a stolen $80 million indestructible suit of armor, developed for the U.S. Army as next-gen combat hardware, which was used to later steal a gun used in a murder committed by a Mafia boss. Meanwhile, Jerry's sister, Isabel (Zuleyka Silver), visits Hawaii under the pretense that she's on the island to visit her big brother, but Jerry later finds out that she stole an elephant from the circus that's currently in town and that she needs his help to get it to a proper sanctuary. Also, Kono grows concerned when she found out that Gabriel Waincroft visited Adam in prison and subsequently offered him a job in expanding his new criminal empire. Adam denies accepting the job, but Kono has her doubts.
139	21	"Ka Pono Ku’oko’a" "The Cost of Freedom"	Peter Weller	John Dove	April 22, 2016 (2016-04-22)	621	8.01
The team are called up on to spearhead a high-profile manhunt for several dangerous criminals who escaped from their transport via chemical explosion and figure out the mastermind behind the hit. One of the convicts who died at the scene was James Hamasaki and one of the escaped is Adam. Shackled together in pairs, Adam and the other five convicts attempt to flee in the jungle. Chin and Jerry discover that Michelle Shioma, daughter of the late Goro, was really targeting Adam, as James and Adam shared a similar appearance. Steve, Danny, Kono, and Grover search for the convicts using the trail Adam left behind. Meanwhile, Steve discovers that another of the deceased is Nahele’s dad.
140	22	"I'ike Ke Ao" "For the World to Know"	Bryan Spicer	David Wolkove	April 29, 2016 (2016-04-29)	622	8.41
Addison Wells (Cassi Thomson), a 22-year-old college student, is kidnapped from the house at which she is babysitting. Five-0 discovers that the abductor hacked into the house's thermostat, baby monitor, laptops, alarm system, and everything else. To crack the case, Steve and Danny recruit their old friend Toast (Martin Starr) who has become a famous multimillionaire for creating the popular phone app "Poopy Penguins". Meanwhile, Kamekona has unveiled his latest enterprise: inter-island booze cruises. With Flippa and Max, the trio set off on the maiden voyage, only to run out of wind, battery power, and food.
141	23	"Pilina Koko" "Blood Ties"	Maja Vrvilo	Eric Guggenheim	May 6, 2016 (2016-05-06)	623	8.56
Vanessa Diaz is found murdered in her home; Five-0 criminal informant/crime scene cleaner Gerard Hirsch (Willie Garson) is attacked when he discovers the house had a safe room and someone jumps out. Kono is sent to watch Hirsch until his attacker is caught. Five-0 learns that the victim had a daughter named Sara that has an uncle in HPD: Chin. When Chin goes to talk to her, he learns that Sara's aunt was Malia, Chin's deceased wife, and that her father is Gabriel Waincroft. Steve and Danny put two and two together and realize that Michelle Shioma is going after Waincroft through his family by killing his wife and kidnapping his daughter. Meanwhile, Kono meets Hirsch's father Leo (Elliott Gould) who asks her to keep Hirsch on the honest path.
142	24	"Pa'a Ka 'ipuka I Ka 'Upena Nananana" "The Entrance Is Stopped with a Spider's Web"	Stephen Herek	Steven Lilien & Bryan Wynbrandt	May 13, 2016 (2016-05-13)	624	8.49
As a meth epidemic sweeps Oahu, Max decides to take the Doctors without Borders opportunity (previously mentioned in I'ike Ke Ao) leaving the ME duties to Dr. Shaw. Meanwhile, Five-0 captures longtime nemesis Gabriel Waincroft, who is badly injured when a drug addict shoots him by accident. As Five-0 attempt to leave, Abby is captured by Michelle Shioma's Yakuza hit squad. Abby later escapes and pleads with her former boss, Robert Coughlin (Ingo Rademacher) to help her track down Shioma's mole in HPD that has been hampering Five-0's efforts to extract Gabriel. Chin and Gabriel separate from the others and make it to an apartment building where Gabriel apologizes for killing Chin's father and asks Chin to take care of Sara. Five-0 gets Gabriel to a hospital, but he goes into cardiac arrest during surgery and dies. Steve, Danny, and the rest of HPD surround Michelle Shioma's house to arrest her, but they discover she took a secret tunnel and disappeared into the wind.
143	25	"O Ke Ali'i Wale No Ka'u Makemake" "My Desire Is Only for the Chief"	Bryan Spicer	Peter M. Lenkov & Matt Wheeler	May 13, 2016 (2016-05-13)	625	8.82
After a chilling meeting with Wo Fat's father in Morocco, Steve returns to battle Hawaii's burgeoning meth epidemic. One of the victims is a friend of Nahele's, so Five-0 returns to the building where they captured Gabriel (in "Pa'a Ka 'ipuka I Ka 'Upena Nananana") to find the source of the meth. Steve and Danny go undercover as drug pilots for Dae Wan (Sung Kang). Midflight, an unknown helicopter attacks the plane and gravely wounds Steve. Danny breaks cover in order to receive instructions on how to land and manages to land the plane on the beach instead of the ocean in order to save Steve. The team learns that Steve ruptured his liver and needs a new one fast. Everyone volunteers, but Danny announces that he and Steve have the same blood type, and offers his liver. Grace, Nahele, Kamekona, Flippa, Max, Jerry, Duke, Pua, Chin, Kono, and Grover wait in the hospital as Steve and Danny undergo the transplant. Later, it is revealed Steve and Danny will make a full recovery. In the end, Steve and Danny are seen arguing about thanks and TV channels.

Season 7 (2016–17)

Main article: Hawaii Five-0 (2010 TV series, season 7)

No. overall	No. in season	Title	Directed by	Written by	Original air date	Prod. code	U.S. viewers (millions)
144	1	"Makaukau 'oe e Pa'ani?" "Ready to Play?"	Bryan Spicer	Peter M. Lenkov & Eric Guggenheim	September 23, 2016 (2016-09-23)	701	10.22
As Steve McGarrett (Alex O'Loughlin) and Danny Williams (Scott Caan) recover from their transplant, a vigilante begins killing serial killers and leaves their bodies on Five-0 property with ivory chess pieces in their mouths. The first is found inside Five-0 Headquarters at Iolani Palace, and the second is found inside Lou Grover's (Chi McBride) car. As Five-0 searches for the killer, Steve must help the new governor, Mahoe (Rosalind Chao) quell the fear that Oahu is no longer safe. Steve later comes home to find a chess piece in his house. Meanwhile, Chin Ho Kelly (Daniel Dae Kim) learns that Sara's aunt and uncle in Mexico are filing for adoption, and Chin starts contemplating fatherhood. This episode features a striking scene in the prologue: McGarrett visits the chapel within Tripler Army Medical Center and encounters an almost-ghostly appearing stranger with whom McGarrett strikes up conversation. The stranger obliquely references having worked for the Hawaii police many years earlier and when Steve begins doubting himself gives advice to McGarrett not to give up. The stranger deliberately resembles the original Steve McGarrett, Jack Lord, (including the voice) and is credited as Jack Lord in the episode's closing credits.
145	2	"No Ke Ali'i Wahine A Me Ka 'Aina" "For Queen and Country"	Sylvain White	David Wolkove & Matt Wheeler	September 30, 2016 (2016-09-30)	702	9.73
Following the events of "Makaukau 'oe e Pa'ani?", Steve and Danny visit retired FBI profiler Alicia Brown (Claire Forlani) to try and track down the mysterious vigilante. Alicia refuses to get involved, but is gradually roped in when Steve purposefully leaves the chess piece the killer left in his house. Meanwhile, a man steals diamonds from renowned billionaire Lucky Morad (Faran Tahir). The girl he used to smuggle the diamonds out of Morad's party is found dead the next morning. The team identifies the suspect as Harry Langford (Chris Vance), a rogue MI6 agent. Langford claims his going rogue was a cover, and he didn't kill the girl. He is tracking a contract bomber, El Hamadi, who bombed an embassy in Madrid in 2012 and is planning to use a cyber key known as the Greystone to plan a larger attack. Steve and Danny go with Langford to Prague to capture Hamadi's contact.
146	3	"He Moho Hou" "New Player"	Bryan Spicer	Peter M. Lenkov & Cyrus Nowrasteh	October 7, 2016 (2016-10-07)	703	9.65
Alicia awakens in her bed to find another body with a chess piece in his mouth beside her. Forced to accept she's now a part of the case, she officially joins Steve and Danny with the investigation. Alicia discovers that the detective who was investigating the three serial killers was actually murdered. At the end, Steve and Alicia visit the police psychologist, Dr. Madison Gray (Elisabeth Röhm), who Detective Lau was seeing before he was killed, and discover she has a book entitled History of Medieval Chess, implying that she's the serial killer. Meanwhile, the team hunts for a cartel boss whose soldiers are gunning for him. Kono reconnects with Rosie, an old surfing rival whose legs were amputated after she drove over an IED in Iraq.
147	4	"Hu a'e ke ahi lanakila a Kamaile" "The Fire of Kamile Rises in Triumph"	Bronwen Hughes	Peter M. Lenkov & Cyrus Nowrasteh	October 14, 2016 (2016-10-14)	704	9.19
Following their meeting with Dr. Gray, Alicia is convinced that she is the killer, but Steve is more wary. Against his orders, Alicia breaks into Dr. Gray's house and finds a chessboard with pieces missing identical to the pieces found with the serial killers. Steve arrives and is stabbed by Dr. Gray, who has already captured Alicia. While Steve drifts in and out of consciousness, Alicia and Dr. Gray play mind games with one another, revealing that Alicia's daughter was pushed into a career in the FBI by her and was subsequently killed by a serial killer, and that Dr. Gray's father sexually abused her as a child while forcing her to play chess. Eventually, Dr. Gray leaves and two infamous serial killers, Donald and Mallory Witten (Danny Michael Mann & Lauren Letherer), take Steve and Alicia to a rocky outcrop, and throw them into a hole that the tide fills up. The rest of Five-0 begin searching for them, and Lou deduces that Dr. Gray is behind everything. Elsewhere, Jerry reports to Chin that a possible red flag may have come up with Sara's aunt and uncle, so Chin turns to Robert Coughlin (Ingo Rademacher) to run background. Lou, Steve, and Jerry discover Steve's torched Silverado, done by Dr. Gray who then disappeared. Lou meets his football hero, Otis Wilson of the 1985 Chicago Bears.
148	5	"Ke Ku 'Ana" "The Stand"	Bobby Roth	Jason Gavin & Derek Santos Olson	October 21, 2016 (2016-10-21)	705	9.51
The Five-0 task force investigate a bulletproof bulldozer that crashed into a gun range and stole all the inventory. Later on, the suspect (Brent Sexton) instigates a hostage situation and demands to be put on the news to protest gun violence and it is up to McGarrett and Danny to talk him down. It is revealed that the suspect's son was the perpetrator in a Virginia shooting that killed eight people. Elsewhere, Adam is released from prison after spending a year and asks Kono's help to track down a fellow inmate's daughter to make up with him.
149	6	"Ka hale ho'okauwel" "House of Horrors"	Ron Underwood	David Wolkove & Matt Wheeler	October 28, 2016 (2016-10-28)	706	8.50
A psychic is apparently scared to death on Halloween, so Five-0 investigates. Danny and Eric discover that the psychic's claims ruined a lot of lives. Max finds a second victim, revealed to be an accomplice to the killer, the psychic's assistant who killed the psychic and the accomplice. Max (Masi Oka) returns from Africa and reveals he married his girlfriend Sabrina. Meanwhile, Jerry babysits a grounded Grace and Charlie, which proves to be a challenge when Grace's sour attitude spoils Jerry and Charlie's anticipated trick-or-treating. Elsewhere, Adam and Kono are kidnapped by a death cult, and are forced to escape with another victim through the woods to an abandoned house.
150	7	"Ka Makuahine A Me Ke Keikikane" "Mother and Son"	Bryan Spicer	Eric Guggenheim & David Wolkove	November 4, 2016 (2016-11-04)	707	9.48
McGarrett's date with Lynn (Sarah Carter) is interrupted when he receives a surprise visit from Catherine Rollins (Michelle Borth), who informs him that his mother Doris (Christine Lahti) has been captured by the CIA in Morocco after her mission to free Wo Fat's father (George Cheung) went sideways. McGarrett reluctantly goes to her aid, upset on the way she has disappeared the past few years. Chin, Kono, and Lou all go along to help him out. Meanwhile, Chin loses his appeal to keep Sara and is forced to let her move to Mexico to live with her aunt and uncle. Elsewhere, as a favor to Danny, Lou recruits his son Will to figure out who Grace is seeing, not knowing Will is her boyfriend.
151	8	"Hana Komo Pae" "Rite of Passage"	Brad Tanenbaum	Rob Hanning	November 11, 2016 (2016-11-11)	708	9.84
Danny chaperones Grace's (Teilor Grubbs) Winter Formal, which turns deadly when an al-Qaeda splinter group storms the event looking to capture one of Will's classmates named Jeremy Ramos (Max Tepper), the son of a High Ranking Diplomat (Clint Jung), in hopes of leveraging a trade for their captured leader. Danny reluctantly must work with Will (Chosen Jacobs), whom he has just learned is Grace's boyfriend, to save everyone. Meanwhile, Steve hosts a poker game.
152	9	"Elua la ma Nowemapa" "Two Days in November"	Maja Vrvilo	Sean Farina	November 18, 2016 (2016-11-18)	709	10.09
A conspiracy theorist and a friend of Jerry's is murdered after having discovered new information about the assassination of John F. Kennedy and the mystery behind it, that tells that JFK's cabinet had planned the assassination. Five-0 soon discover that there were more people behind the assassination than first thought. This later leads to Jerry telling the story of the Honolulu conference that took place on November 20, 1963. Meanwhile, Lou begins to have doubts about his son Will dating Danny's daughter Grace.
153	10	"Ka Luhi" "The Burden"	Carlos Bernard	Helen Shang & Zoe Robyn	December 9, 2016 (2016-12-09)	710	9.40
Five-0 investigates a 10-year-old cold case of a missing teenager when a boy, (Joey Luthman) who is suffering from PTSD undergoes hypnosis and afterwards, realizes he might have been a witness to the missing teen's murder. Meanwhile, Danny's sister Bridget (Missy Peregrym) comes to visit Oahu for a business conference. Not long after, Danny begins to suspect that she is getting a little "too close" to one of her co-workers.
154	11	"Ka'ili Aku" "Snatchback"	Jennifer Lynch	Matt Wheeler	December 16, 2016 (2016-12-16)	711	9.46
It's Christmas time and Five-0 celebrates Chin's birthday until he receives a call that his niece Sara has been kidnapped in Mexico by the Diego drug cartel. While trying to rescue Sara, the team finds out that this was a revenge kidnap plan towards Five-0. Later on, Chin takes the matter into his hands and surrenders himself to the cartel in order to get Sara back, leaving his life hanging in the balance.
155	12	"Ka 'Aelike" "The Deal"	Joe Dante	David Wolkove & Matt Wheeler	January 6, 2017 (2017-01-06)	712	10.10
After Chin is kidnapped by the Diego drug cartel, Five-0 race against the clock to rescue him from being executed. Later on, Sara's aunt and uncle suggest that Sara live with Chin due to the dangerous circumstances in Mexico, which he accepts. The episode transitions to a case involving murder which prompts Lou to go undercover as a car salesman. Meanwhile, McGarrett suspects that Max might leave Hawaii when he mentions possible coroner replacements and selling his house which leads to Max confiding to McGarrett that he is moving to Africa with Sabrina.
156	13	"Ua ho'i ka 'opua i Awalua" "The Clouds Always Return to Awalua"	Jim Jost	Cyrus Nowrasteh	January 13, 2017 (2017-01-13)	713	9.69
Max begins to pack up his belongings with Jerry and begins to reminisce various times with Five-0 and his life in Hawaii. Five-0 also has a farewell party for Max. Meanwhile, the team investigates the murder of a police officer found at a building explosion site. Note: This is the last episode to feature Masi Oka as a main cast member
157	14	"Ka laina ma ke one" "Line in the Sand"	Peter Weller	Sean O'Reilly	January 20, 2017 (2017-01-20)	714	8.42
Five-0 is dealt with an overbearing U.S. Marshall (guest star Lou Diamond Phillips) when they try to capture a person suspected in a murder investigation who crossed over the border to seek asylum on sacred land. Meanwhile, McGarrett takes a road test after his drivers license expired over 7 years ago.
158	15	"Ka Pa'ani Nui" "Big Game"	Bryan Spicer	Helen Shang	February 3, 2017 (2017-02-03)	715	9.81
Five-0 investigates the murder of a diver who was suspected of doing illegal shark finning. They soon discover that the murder suspect is a former Nazi criminal when they discover that the victim has a tattoo symbolizing a holocaust concentration camp. Meanwhile, Kamekona enlists Five-0 to get rid of his workers who are protesting for better pay and benefits.
159	16	"Poniu I Ke Aloha" "Crazy In Love"	Jerry Levine	David Wolkove & Matt Wheeler	February 10, 2017 (2017-02-10)	716	9.86
It's Valentine's Day and McGarrett treats his girlfriend Lynn to a romantic getaway. To his surprise, Danny also is on the same getaway with his girlfriend Melissa at the same hotel and they decide to have a joint vacation. Things take a crazy turn when Danny loses his sunglasses and suspects a kid he antagonized on the beach. Meanwhile, Kono, Chin and Lou investigate a man murdered at a local nightclub after he took a class on how to pick up women.
160	17	"Hahai i na pilikua nui" "Hunting Monsters"	Roderick Davis	Rob Hanning	February 17, 2017 (2017-02-17)	717	9.62
Alicia Brown gets baited when Dr. Madison Gray surrenders into HPD, under the alias Lauren Parker, with blood on her hands seemingly belonging to Brown. While the team does not believe that "Parker" has Dissociative Identity Disorder, Gray manages to get Alicia to break her out of jail, intent on killing both her and Sienna, her supposedly dead daughter to finish off the job. In the end, Gray confronts Alicia at the latter's home. Meanwhile, Kamakona and Flippa open up a second food truck that Kamakona does not approve of.
161	18	"E Malama Pono" "Handle with Care"	Eagle Egilsson	Zoe Robyn	February 24, 2017 (2017-02-24)	718	9.12
Sang Min tells McGarrett useful intelligence in finding the missing Uranium. After being kidnapped while investigating, henchmen set off the bomb and it's up to McGarrett and Danny to deactivate it. Meanwhile, Danny reveals to McGarrett that he is considering retiring from the police force and opening a restaurant.
162	19	"Puka 'ana" "Exodus"	Bronwen Hughes	Eric Guggenheim	March 10, 2017 (2017-03-10)	719	9.20
McGarrett and Kono investigate the disappearance of a young girl who is suspected of being a victim of a sex trafficking ring, which sends an infuriated Kono on a personal mission to track down the people responsible. Meanwhile, Chin and Lou investigate the murder of a member of a sober relief facility. Danny visits his sister in New Jersey.
163	20	"Huikau Na Makau A Ka Lawai'a" "The Fishhooks of the Fishers become Entangled"	Jerry Levine	Matt Wheeler	March 31, 2017 (2017-03-31)	720	8.74
Five-0 reunites with Private Intestigator Harry Brown (guest star William Forsythe) and help him investigate the kidnapping of the wife of a wealthy businessman who is holding a secret deeper than what he is explaining. Meanwhile, Danny's ex-wife Rachel (guest star Claire van der Boom) drops a bombshell saying that she is getting a divorce from Stan and wants Danny's help on how to tell the kids.
164	21	"Ua Malo'o Ka Wai" "The Water is Dried Up"	Eagle Egilsson	Peter M. Lenkov & Eric Guggenheim	April 7, 2017 (2017-04-07)	721	8.77
While investigating the deaths of ship boat Captains, McGarrett and Five-0 are captured by Michelle Shioma and her criminal empire and are faced with death. With fearing something terrible happening, Jerry recruits the HPD to rescue them. As a thanks, Steve finally awards Jerry a badge. Meanwhile, Grover and his son travel to Chicago so Grover could testify against a string of dirty cops, and Grover learns the social consequences of turning on Clay Maxwell.
165	22	"Waimaka 'Ele'ele" "Black Tears"	Bryan Spicer	David Wolkove	April 14, 2017 (2017-04-14)	722	8.49
Five-0 investigates the death of one of the last survivors of the World War II USS Arizona (BB-39) tragedy, a veteran who was killed in a hit-and-run automobile accident. McGarrett soon discovers that the victim had connections to his grandfather, Ensign Steven McGarrett, who had served with the victim on the Arizona, and makes his best effort to catch the people responsible. Meanwhile, Adam starts a new job in construction and asks for Jerry's help when he finds a bone fragment and thinks it might be a burial site.
166	23	"Wehe 'ana" "Prelude"	Maja Vrvilo	Helen Shang & Zoe Robyn	April 28, 2017 (2017-04-28)	723	8.06
Danny must protect a comatose witness from his last HPD case from seven years ago alongside his old HPD precinct boss, Captain Tanaka (Ret.), while Steve and Five-0 race to save their lives after discovering that the hit was ordered by the Ochoa cartel from season 1. Flashbacks reveal the details of the case, including the fact that after losing the witness, Danny was put onto the John McGarrett murder case, leading to his meeting with Steve.
167	24	"He ke'u na ka 'alae a Hin" "A Croaking By Hina's Mudhen"	Krishna Rao	Rob Hanning	May 5, 2017 (2017-05-05)	725	8.01
When McGarrett receives word about a major terrorist attack on Hawaii from an ex-terrorist he captured 10 years ago, the Five-0 team is reluctant to believe him. Kono and Adam help Gerard Hirsch (guest star Willie Garson) expand his crime scene cleaning business. Chin receives an offer to run a task force like Five-0 in San Francisco and struggles with the decision - ultimately accepting the offer and will take Abby and Sara with him.
168	25	"Ua Mau Ke Ea O Ka Aina I Ka Pono" "The Life of the Land is Perpetuated in Righteousness"	Bryan Spicer	Peter M. Lenkov & Eric Guggenheim	May 12, 2017 (2017-05-12)	724	8.22
The Five-0 team works with HPD to stop a sex-trafficking ring from shipping girls off the island. McGarret devises a plan that no one believes they can pull off and the team discovers that the ring has vast reaches on the mainland. Kono makes a decision to join a multi-agency task force combating sex trafficking in Carson City, Nevada. note: This is the final appearances of Daniel Dae Kim & Grace Park as series regulars

Season 8 (2017–18)

Main article: Hawaii Five-0 (2010 TV series, season 8)

No. overall	No. in season	Title	Directed by	Written by	Original air date	Prod. code	U.S. viewers (millions)
169	1	"A'ole e 'olelo mai ana ke ahi ua ana ia" "Fire Will Never Say that It Has Had Enough"	Bryan Spicer	Peter M. Lenkov & Eric Guggenheim & Rob Hanning	September 29, 2017 (2017-09-29)	801	8.64
Five-0 investigates a world class hacker (Joey Lawrence), who turns out to be the brother of serial hacker Ian Wright, after the former hacks into the Hawaii State prison and releases serial murderer/arsonist Jason DuClair (Randy Couture). DuClair soon leads the team on a manhunt that ends with a massive wildfire. McGarrett and Danny recruit lifeguard and former police candidate Tani Rey (Meaghan Rath) to join the task force to assist them but she is reluctant to do so. McGarrett and Danny invest in a restaurant. Note: This is the first episode to feature Meaghan Rath, Taylor Wily, Dennis Chun, and Kimee Balmilero as series regulars.
170	2	"Na La 'Ilio" "Dog Days"	Tara Miele	David Wolkove & Matt Wheeler	October 6, 2017 (2017-10-06)	803	8.53
After a failed DEA drug bust, Five-0 teams up with them to solve the case. Steve finds one of the DEA agent's dog shot, and later adopts him, naming him Eddie. Former Navy SEAL Junior Reigns (Beulah Koale) turns to McGarrett looking for a job. Steve initially turns him down, after he insists Steve introduces him to Duke Lukela then informs Junior that to become a part of the task force he will need to join and finish the Police academy. Note: This is the first episode to feature Beulah Koale as a series regular.
171	3	"Kau pahi, ko'u kua. Kau pu, ko'u po'o." "Your Knife, My Back. My Gun, Your Head."	Eagle Egilsson	David Wolkove & Matt Wheeler	October 13, 2017 (2017-10-13)	802	8.51
Five-0 with the help of former MI6 agent Harry Langford (guest star Chris Vance) investigate the murder of Jimmy Okada and 9 members of his crime family. Danny and Steve try their best by making dinner for Langford and his date.
172	4	"E uhi wale no 'a'ole e nalo, he imu puhi" "No Matter How Much One Covers a Steaming Imu, The Smoke Will Rise"	Antonio Negret	Rob Hanning	October 20, 2017 (2017-10-20)	804	8.67
Five-0's confidential informant Toast is murdered during a phone call between him and McGarrett. Five-0 turns to Aaron Wright (Joey Lawrence) for help, but when Tani is ambushed in the hotel room with Wright, the team realise that Wright is behind the leak of their confidential informants. Kamekona is abducted by Joey Kang and beaten for information about money that Kang lost before he was captured. On another hand, Junior is proving efficient at the shooting field at the HPD academy, but after McGarrett finds him at a building set up for homeless people, he decides Junior can live with him while finishing at the academy.
173	5	"Kama'oma'o, ka 'aina huli hana" "At Kama'oma'o, The Land of Activities"	Bronwen Hughes	Peter M. Lenkov & Eric Guggenheim	November 3, 2017 (2017-11-03)	805	8.63
On Halloween, Five-0, with the help of Alicia Brown (Claire Forlani), investigate the death of Tyler Riggins who is found dead in his truck stranded on the old Pali Highway. They are able to connect the recent murder of Bryon Hansen with Riggins’ murder, and discover that the murders are heavily based on old Hawaiian folklore and that it is the killers pattern. On the mainland, Grover speaks to a captive named Sebastian Wake, who gives the information about Clay Maxwell murdering his wife before he is executed.
174	6	"Mohala I Ka Wai Ka Maka O Ka Pua" "Unfolded by the Water Are the Faces of the Flowers"	Carlos Bernard	Eric Guggenheim & Zoe Robyn	November 10, 2017 (2017-11-10)	808	9.21
A man with a multiple personality disorder, including a child and a protective father, takes on the identity of a Honolulu Police Department officer and commits a series of murders. Five-0 must do everything they can to find him. Steve's friends hold an intervention and hire a stress evaluator to try and help McGarrett reduce his stress.
175	7	"Kau Ka ‘Onohi Ali’i I Luna" "The Royal Eyes Rest Above"	Bryan Spicer	Peter M. Lenkov & Eric Guggenheim	November 17, 2017 (2017-11-17)	807	9.17
After picking up Adam (Ian Anthony Dale) from the airport, McGarrett receives a call from Junior about a bank robbery in progress. Adam, Junior, and Steve then enter the bank and learn that the criminals escaped through a tunneled out hole in the safe. Tani keeps her brother, Koa, from being arrested in a drug bust, not knowing that they were being recorded by street cameras. Adam is forced to return to an empty home without Kono. Note: This is the first episode to feature Ian Anthony Dale as a series regular.
176	8	"He Kaha Lu'u Ke Ala, Mai Ho'okolo Aku" "The Trail Leads To A Diving Place; Do Not Follow After"	Ron Underwood	Liz Alper & Ally Seibert	December 1, 2017 (2017-12-01)	806	8.56
Five-0 is asked to investigate the plane crash of a stunt plane which took the life of the famous stunt pilot Jason Sachs. Despite being refused access to investigate evidence by the NTSB, the team discovers it was a cover up, and take the lead investigator Callahan into custody. It’s later revealed that the real Sachs died in a car crash 6 years ago, and that the one that died was actually an informant undercover in the Guillermo crime family. Also, when a stunt plane happens to crash with Steve in it taking over for Nixon, he successfully manages to land.
177	9	"Make Me Kai" "Death at Sea"	Maja Vrvilo	David Wolkove & Matt Wheeler	December 8, 2017 (2017-12-08)	809	9.07
Five-0 investigates a woman who was found adrift at sea unconscious. McGarrett, Danny, Tani and Junior discover a yacht abandoned at sea and find 11 dead bodies. McGarrett suspects that these victims were killed with a deadly bioweapon and fears that he and his team are exposed. Adam, Grover and Jerry have only 8 hours to track down the people responsible and find an antidote to save the team. While in quarantine, Tani beats Steve at chess resoundingly (the game is actually the famous Opera Game won by Paul Morphy).
178	10	"I Ka Wa Ma Mua, I Ka Wa Ma Hope" "The Future is in the Past"	Peter Weller	Zoe Robyn	December 15, 2017 (2017-12-15)	810	8.48
Following the events of the previous episode, the team is recovering at the hospital in quarantine. The room is breached by a gunman and Danny is shot. The team is unable to leave the room because an explosive is placed on the door. While unconscious, Danny dreams of a future where Grace is marrying Will Grover, Charlie becomes a member of the Honolulu Police Department and is offered a job on Five-0 by Tani, Adam and Kono have a child, and Tani is the new leader of the Five-0 Task Force at the rank of Captain and is married to Junior.
179	11	"Oni Kalalea Ke Ku A Ka La'au Loa" "A Tall Tree Stands Above the Others"	Tara Miele	Rob Hanning	December 15, 2017 (2017-12-15)	811	7.71
On Christmas Eve, Danny tells Charlie a bedtime story about injured veterans helping Five-0 after Steve witnesses the aftermath of a gang of robbers dressed as Santa Claus. Also, Junior officially becomes a member of the Five-0 Task Force.
180	12	"Ka Hopu Nui 'Ana" "The Round Up"	Eagle Egilsson	David Wolkove & Matt Wheeler	January 5, 2018 (2018-01-05)	812	9.96
When a government task-force is set up in the state with a goal to reduce gang related violence, a member of the task force is killed in a bombing. The Five-0 Task Force teams up with the government task-force, HPD, and the National Guard to solve the murder. Later, Steve asks Adam to head up a special division within the Five-0 Task Force which focuses solely on organized crime which he accepts.
181	13	"O Ka Mea Ua Hala, Ua Hala Ia" "What is Gone is Gone"	Roderick Davis	Sean O'Reilly	January 12, 2018 (2018-01-12)	813	9.38
When Lou and his son come across a man attempting to commit suicide, they learn he’s charged with murdering his wife, but keeps protesting his innocence. Grover attempts to talk to him down while the rest of the team investigates the case in an attempt to prove his innocence.
182	14	"Na Keiki A Kalaihaohia" "The Children of Kalaihaohia"	Peter Weller	Story by: Peter M. Lenkov Teleplay by: Eric Guggenheim	January 19, 2018 (2018-01-19)	814	9.14
After Steve and Danny's restaurant is robbed, McGarrett and Danny enlist the help of Pua Kai at the Honolulu police to track down their stolen tools. Five-0 investigates a diamond smuggler corpse stolen from a graveyard. They must track down his partner before the stolen diamonds are smuggled out of Hawaii. Also, Adam recruits the first member of his organized crime task force as a confidential informant. At the same time, he helps Tani’s brother Koa get a job in construction, only to find Koa overdosed on drugs.
183	15	"He Puko'a Kani 'Aina" "A Coral Reef Strengthens Out into Land"	Bryan Spicer	David Wolkove & Matt Wheeler	February 2, 2018 (2018-02-02)	815	8.56
Five-0 investigates the murder of a private detective and his client, both killed in the same way. Adam puts his organized crime task force into full effect by putting Jessie into a dangerous undercover mission which leads to Adam getting kidnapped. Also, Danny’s eccentric Uncle Vito (Vincent Pastore) comes to Hawaii to help Danny and McGarrett get their restaurant off the ground, but runs into some problems in the process.
184	16	"O Na Hoku O Ka Lani Ka I 'Ike Ia Pae" "Only the Stars of Heaven Know Where Pae Is"	Jerry Levine	David Wolkove & Matt Wheeler	March 2, 2018 (2018-03-02)	816	8.00
Adam is tied up alone, covered by ants, and screaming, inside a shipping container in the middle of the forest. He is forced to tell his kidnapper about hidden money from his Yakuza days. Meanwhile, Tani and Junior go undercover to a private school as prospective parents in an attempt to solve a missing person's case. After attending some school functions, they receive enough information to make an arrest, but the suspect confirms McGarrett's suspicions about the real culprit. Also, Danny's uncle Vito attempts to assist Danny and McGarrett in expediting their liquor license application, but winds up getting arrested.
185	17	"Holapu Ke Ahi, Koe Iho Ka Lehu" "The Fire Blazed Up, Then Only Ashes Were Left"	Maja Vrvilo	Liz Alper & Ally Seibert	March 9, 2018 (2018-03-09)	817	7.68
Adam & Jessie pull off a dangerous robbery of Chlorine gas as part of their undercover sting operation. However, when two tanks of the gas go missing, Adam assists Five-0 in tracking them down to prevent a chemical weapon from being unleashed on the island. Also, Adam confronts Jessie about her true loyalties.
186	18	"E Ho'Oko Kuleana" "To Do One's Duty"	Alex O'Loughlin	David Wolkove & Matt Wheeler	March 30, 2018 (2018-03-30)	818	7.80
When Adam is pulled over by HPD and a dead body is found in the trunk of his car, he is arrested by the FBI. The Five-0 Task Force must prove his innocence be fore he gets sent to prison again. Jessie is their first suspect as she admits to having an affair with one of Hideki’s lieutenants. Meanwhile, Junior and Tani must walk a beat as new recruits. Also, Danny meets with the wife of the person who shot him in quarantine. This episode marks the directional debut of Alex O'Loughlin (Steve McGarrett).
187	19	"Aohe Mea Make I Ka Hewa; Make No I Ka Mihi Ole" "No One Has Ever Died For the Mistakes He Has Made; Only Because He Didn't Repent"	Jennifer Lynch	Rob Hanning & Ashley Dizon	April 6, 2018 (2018-04-06)	819	7.97
A man Steve's father, John McGarrett, was investigating for murder comes forward to Five-0 and reveals where he buried all the bodies back in the 1970s & 1980s. Also Adam's newly discovered half-sister orders Adam to pay her $20,000,000 in exchange for the safety of Kono, Chin, Sara, and Abby. Danny, Jerry, and Lou deal with a harsh fire marshal determining the safety of the Five-0 offices.
188	20	"He Lokomaika’I Ka Manu O Kaiona" "Kind Is the Bird of Kaiona"	Bryan Spicer	Rob Hanning & Sean O'Reilly	April 13, 2018 (2018-04-13)	820	7.48
Former Five-0 member Lieutenant Catherine Rollins returns to Hawaii and asks Five-0 to assist the Central Intelligence Agency in finding a suspected terrorist who is building dirty bombs using uranium that was left behind by the Navy in a former military bunker. Meanwhile, when Adam's confidential informant Jessie is murdered after she stole Adam's $20,000,000, he decides to shut down his organized crime task force and move back to the mainland with Kono. Elsewhere, Junior falls and injures himself during a run and relies on McGarrett's dog Eddie to find help. Later, McGarrett is informed that Noriko, Adam's half-sister, was found dead when her body washed up on a beach.
189	21	"Ahuwale Ka Nane Huna" "The Answer To The Riddle Is Seen"	Eagle Egilsson	David Wolkove & Matt Wheeler	April 20, 2018 (2018-04-20)	821	7.52
When an anonymous person mails Five-0 a videocassette recording of a murder from many years ago, Junior, Lou, and Tani must find out who the victim and murderer are. Meanwhile, former MI6 agent Harry Langford returns to the island, providing private security for distant relatives of the Royal Family, with McGarrett and Danny tagging along to help find their teenage daughter who has gone missing.
190	22	"Kopi Wale No I Ka I'a A 'Eu No Ka Ilo" "Though the Fish is Well Salted, the Maggots Crawl"	Ruba Nadda	Rob Hanning & Rachael Paradis	April 27, 2018 (2018-04-27)	822	7.79
After Duke's granddaughter is kidnapped, he is forced to take evidence from an ongoing HPD murder case. However, before he can return what the kidnappers asked for, the evidence is stolen from Duke. Also, to solve a murder, Jerry goes undercover at a mental hospital.
191	23	"Ka Hana A Ka Makua, O Ka Hana No Ia A Keiki" "What Parents Will Do, Children Will Do"	Jim Jost	Peter M. Lenkov & Matt Wheeler	May 4, 2018 (2018-05-04)	823	7.04
Cammy Lin is witness to the murder of mob boss Tommy Boyle in his own home. She and her mother Mei escape, but she is murdered in their attempt. During the investigation, Five-0 discover that the FBI has been keeping tabs on Conor Boyle, Tommy’s son, for an active investigation. Meanwhile, Steve also has Eddie checked at the vet. Elsewhere, he attempts to help Danny in Kung-fu fighting, which the latter isn’t pleased by.
192	24	"Ka Lala Kaukonakona Haki 'Ole I Ka Pa A Ka Makani Kona" "The Tough Branch That Does Not Break in the Kona Gale"	Krishna Rao	Story by: Alex O'Loughlin Teleplay by: Zoe Robyn	May 11, 2018 (2018-05-11)	825	7.09
Junior is recalled last-minute by the SEALs on a mission to Nigeria, but is joined by McGarrett after finding out that the mission is to free an American hostage: Joe White. Meanwhile, Kamekona and Gerard Hirsch bring a case of stolen artwork to Lou & Tani, insisting on doing the crime investigation with them.
193	25	"Waiho Wale Kahiko" "Ancients Exposed"	Bryan Spicer	Peter M. Lenkov & Eric Guggenheim	May 18, 2018 (2018-05-18)	824	6.62
When a rogue Russian submarine appears off the shore of Honolulu and causes panic to the island, Five-0 must solve the mystery of why it's there. Meanwhile, Steve and Danny hire Kamekona and Flippa as silent partners to their restaurant they begin making a lot of changes without consulting them. Later, Tani confides in Junior by telling him that she found a gun in Adam's house which matches to the slugs found in Noriko.

Season 9 (2018–19)

Main article: Hawaii Five-0 (2010 TV series, season 9)

No. overall	No. in season	Title	Directed by	Written by	Original air date	Prod. code	U.S. viewers (millions)
194	1	"Ka ʻōwili ʻōkaʻi" "Cocoon"	Bryan Spicer	Leonard Freeman & Peter M. Lenkov	September 28, 2018 (2018-09-28)	903	7.49
Five-0 investigates the murder of one of McGarrett’s CIA agent friends and suspects that there might be a mole within the CIA. McGarrett’s lets himself be captured in order to find the mole, only to find out it's be McGarrett's ex-girlfriend CIA Agent Greer. While in a sensory deprivation tank, McGarrett dreams that Wo Fat is responsible. Meanwhile, Tani struggles to find the nerve to tell McGarrett about possibly finding the murder weapon to Adam’s sister in his house. Also, McGarret decides to bury the money Kamekona loaned him in a hole he and Junior dig in his backyard. Note: This episode is a re-make of the original series pilot episode "Cocoon."
195	2	"Ke Kanaka I Haʻule Mai Ka Lewa Mai" "The Man Who Fell From the Sky"	Eagle Egilsson	David Wolkove & Matt Wheeler	October 5, 2018 (2018-10-05)	902	7.39
Five-0 investigates the disappearance of a vacationer and a U.S. Marshal who fled a plane mid-flight. They soon discover that the vacationer is actually a Chinese sleeper agent who killed the U.S. Marshal in the process. Agent Greer is revealed to be working with the Chinese spy's and Five-0 arrests her. Meanwhile, Tani reaches out to her training instructor at the Police Academy to run ballistics on Adam’s gun off the book. Also, McGarrett and Danny lose part of Kamekona’s investment money thanks to McGarrett’s dog Eddie who dug it up.
196	3	"Mimiki Ke Kai, Ahuwale Ka Papa Leho" "When the Sea Draws Out the Tidal Wave, the Rocks Where the Cowries Hide Are Exposed"	Antonio Negret	Rob Hanning	October 12, 2018 (2018-10-12)	901	7.68
During a heat wave, an arrested woman undergoing transport shoots two Honolulu Police Department (HPD) officers and a motorcyclist in cold blood. With an increase in 911 calls, Tani and Junior are forced to assist the HPD. Meanwhile, a black-out persuades Kamekona to price-gouge prices at his Shaved Ice stand, only to have the stand toppled over and damaged by angry customers. While at the grocery store, Jerry stops a robbery in progress to find out the suspect's wife is pregnant at home and in bad condition. At the golf course, Grover beats his best score.
197	4	"A'ohe Kio Pohaku Nalo i Ke Alo Pali" "On the Slope of the Cliff, Not One Jutting Rock Is Hidden from Sight"	Ron Underwood	Talia Gonzalez & Bisanne Masoud	October 19, 2018 (2018-10-19)	905	7.48
Jerry travels with Junior to bring home a fallen soldier whom Junior motivated to join the service and was killed in action. Jerry opens up about how he was rejected from joining the service. Meanwhile, McGarrett and Danny investigate a footless body found in sand dumped from a truck that was part of black market dredging and selling of ocean sand, which lead to them finding not one but two weighted pairs of feet in the ocean. Also, Duke decides to retire from the HPD but McGarrett talks him into trying to clear his name first.
198	5	"A'ohe Mea 'Imi A Ka Maka" "Nothing More the Eyes to Search For"	Liz Allen-Rosenbaum	Zoe Robyn & Sean O'Reilly	October 26, 2018 (2018-10-26)	904	6.97
On Halloween night, the Five-0 task force investigates a series of pictures of murder scenes that were drawn by a child's mysterious friend who has been a pawn in a series of murders. Meanwhile, Jerry revisits his childhood campsite to search for the remains of a fellow camper who had been murdered and that Jerry had witnessed. Later, Tani receives a call from her Police Academy instructor who ran the ballistics on the gun she found at Adam's house, and it was revealed as the weapon that killed Adam's sister.
199	6	"Aia I Hi'Ikua; I Hi'Ialo" "Is Borne on the Back; Is Borne in the Arms"	Peter Weller	Rob Hanning & Paul Grellong	November 2, 2018 (2018-11-02)	906	7.88
McGarrett receives news that one of his Navy SEAL team members was killed and learns that he is a suspect in a kidnapping case led by an NCIS agent. Later on, McGarrett takes things too far and interferes with the investigation and gets arrested. Meanwhile, Adam returns to Hawaii and reveals that he and Kono had broken up. Tani hesitates with the decision to turn in Adam because of the gun she discovered but later finds out that someone is trying to set him up.
200	7	"Pua A'e La Ka Uwahi O Ka Moe" "The Smoke Seen in the Dream Now Rises"	Bryan Spicer	Story by: Peter M. Lenkov Teleplay by: David Wolkove & Matt Wheeler	November 9, 2018 (2018-11-09)	907	7.53
In present day Hawaii, during the soft opening of McGarrett and Danny's restaurant, a man approaches McGarrett revealing that he was best friends with and had worked with McGarrett's grandfather back in the 1940s. He gives McGarrett an unsolved 1940s case for him to investigate. Later on, while working through the case contents, McGarrett falls asleep and has a dream in which he is his grandfather and the rest of the Five-0 team are members of the unsolved case.
201	8	"Lele pū nā manu like" "Birds of a Feather..."	Carlos Bernard	Chi McBride	November 16, 2018 (2018-11-16)	908	7.88
Lou has trouble with his family when his brother, mother, and father visit for Thanksgiving. Lou and his brother attempt to cook Thanksgiving dinner together and the two make it into a competition to see who can get the best turkey. When they into an argument, a fire starts in Lou's kitchen. Meanwhile, the rest of the Five-0 task force attempt to solve the case of a missing baseball card. The thief of the baseball card turns out to be a volunteer at a local homeless shelter who only stole it to buy dinner for the shelter.
202	9	"Mai Ka Po Mai Ka 'oia'i'o" "Truth Comes From the Night"	Brad Tanenbaum	Christos Gage & Ruth Fletcher Gage	November 30, 2018 (2018-11-30)	909	7.27
Five-0 investigates the murder of a local citizen who is responsible for making citizen's arrests and filming them. It is found the citizen was impersonating comic book characters. Jerry's wide knowledge of comic books along with their characters helps Five-0 solve the case. Meanwhile, Adam looks into the person responsible for killing his sister and framing him. The person however, turns themselves in before he can find them.
203	10	"Pio ke kukui, poʻele ka hale" "When the Light Goes Out, the House is Dark"	Gabriel Beristain	Paul Grellong	December 7, 2018 (2018-12-07)	911	7.81
When McGarrett is attacked and almost killed in his own home he is forced to flee Hawaii and travel to Montana with Joe White. Joe reveals that there is an assassin killing all of McGarrett’s SEAL team members who participated in an operation involving a 10-year-old boy. The rest of the Five-0 looks into the person who is trying to seek revenge. When McGarrett and Joe get into a gun battle with the assassins, Joe gets shot and later dies as a result of the injuries.
204	11	"Hala i ke ala o'i'ole mai" "Gone on the Road from which There Is No Returning"	Carl Weathers	Matt Wheeler & David Wolkove	January 4, 2019 (2019-01-04)	910	7.19
Danny travels to Montana to reunite with McGarrett, who has exiled himself following Joe White’s death. Danny soon discovers that Steve and Catherine Rollins have been interrogating someone to find the person responsible for Joe’s death and upon identifying them set off with a team to take him down. Meanwhile, back in Hawaii, Grover, Tani and Adam investigate the disappearance of a bag of bones found abandoned in a storage locker.
205	12	"Ka hauli o ka mea hewa 'ole, he nalowale koke" "A Bruise Inflicted on an Innocent Person Vanishes Quickly"	Roderick Davis	Zoe Robyn	January 11, 2019 (2019-01-11)	912	7.96
When Danny's daughter Grace doesn't return home from a party, his ex-wife Rachel turns to him for help. HPD finds her car rolled over in an embankment off the side of the road, with evidence pointing to her car travelling at an excessively dangerous speed. That does not match the Grace they know and Five-0 investigates, and find someone else is responsible. Meanwhile, after Tani's brother, Koa, has a friend who didn't check in during their rehab process. Tani and Adam investigate and find multiple people dead who overdosed on drugs.
206	13	"Ke iho mai nei ko luna" "Those Above are Descending"	Karen Gaviola	Story by: Johnny Richardson Teleplay by: Rob Hanning & Sean O’Reilly	January 18, 2019 (2019-01-18)	913	7.61
Murdered Jason Kamaka is washed ashore, amid signs he died deep underwater. Tani, Adam and Junior travel to Claude Nostromo's remote submarine environmental lab deep under the Pacific Ocean as one of the remaining crew must be the murderer: Walker, Brady, Nash, Cane. Junior and Tani discover a secret lab and evidence that Nostromo secretly tasked certain crew to map deposits of yttrium, a valuable substance he plans to mine illegally. It seems Nostromo remotely cut communications and set out to eliminate his own agents to keep the secret. Cane turned on Nostromo after he secretly tasked her to ensure his secret mission's success. She now plans to murder everyone aboard by sabotaging the base's oxygen supply. An evacuation ship is on the way but with the air about to run out McGarrett undertakes a risky free-dive to supply more oxygen. Meanwhile, Grace recuperates after her near-death car accident. Junior lends a hand to his estranged father.
207	14	"Ikiiki i ka la o Keawalua" "Depressed with the Heat of Keawalua"	Peter Weller	Paul Grellong	February 1, 2019 (2019-02-01)	914	7.87
The Five-0 task force investigates the murder of one of Flippa’s friends and fellow band member. They soon discover that the suspect is a white supremacist, who just got out of prison four months ago, and is planning a bombing. Meanwhile, Grover grows close to this case as he dealt with a similar situation back in Chicago.
208	15	"Ho'Opio 'Ia E Ka Noho Ali'I A Ka Ua" "Made Prisoner by the Reign of the Rain"	Karen Gaviola	Rob Hanning	February 15, 2019 (2019-02-15)	915	7.30
When a hurricane threatens the island, the FBI is forced to use Five-0 Headquarters as a holding spot for a recently captured most-wanted criminal, while the building is also being used as an evacuation refuge. A criminal cartel operative infiltrates Five-0 HQ and McGarrrett elicits the fact that the prisoner is about to turn State's evidence, so now the race is on to prevent the prisoner's murder. Meanwhile, after Tani and Junior are sent to aid with evacuation, Tani is held hostage in a house whose tenants are drug dealers. Also, Rachel and Danny begin rekindling their romantic relationship after she is forced to stay at his house during the storm.
209	16	"Hapai ke kuko, hanau ka hewa" "When Covetousness is Conceived, Sin is Born"	Jerry Levine	Talia Gonzalez & Bisanne Masoud	February 22, 2019 (2019-02-22)	916	7.11
The Five-0 task force investigates the poisoning of Gwendoline Baker, the top salesperson of a beauty company. McGarrett finds out that the company is a pyramid scheme and that Baker was about to unmask the company's owner, Jocelyn Greene, with wrong-doing. Tani shares a personal story that involves the case. Meanwhile, Adam, who has just moved into a new home, lends a hand to a homeless man trying to reconnect with his family on the mainland.
210	17	"E'ao lu'au a kualima" "Offer Young Taro Leaves To"	Alex O'Loughlin	David Wolkove & Matt Wheeler	February 22, 2019 (2019-02-22)	917	6.98
McGarrett and the task force investigates the latest in a string of high-value bank robberies. Junior runs into one of his old friends who works there and she insists she recognised one of the robbers despite the mask – Tory, the boyfriend of Junior's ex-girlfriend Layla. Junior decides to delay informing McGarrett in order to talk to him. Layla, mother to Tory's infant son, is indignant and defends Tory. Meanwhile, Five-0's police work tracks down the heist's mastermind. The murderer forces Tory to lure Junior to a meeting to force him at gunpoint to reveal what Five-0 knows, but Junior realises it is a trap and shows up with armed support. A gunfight ensues, and Tory and Junior end up in an armed stand-off, which ends in the former's death and a widowed Layla slapping Junior in retaliation.
211	18	"Ai no i ka 'ape he mane'o no ko ka nuku" "He who eats 'ape is bound to have his mouth itch"	Eagle Egilsson	Matt Wheeler & David Wolkove	March 8, 2019 (2019-03-08)	918	7.27
Junior and Tani are forced to go undercover at a local gym as Five-0 investigates a series of lethal steroid injections going around Honolulu. Meanwhile, McGarrett meets and chauffeurs Danny’s ex-mother-in-law Amanda who is a famous author. Danny and Amanda initially butt heads but the two later make up when it is revealed she wants the best for Rachel.
212	19	"Pupuhi ka he’e o kai uli" "The octopus of the deep spews its ink"	Maja Vrvilo	Christos Gage & Ruth Fletcher Gage	March 15, 2019 (2019-03-15)	919	6.51
Five-0 investigates the murder of a high-rise window washer. They quickly discover that he is a renowned street artist who may have had a target on his back because of his political beliefs. Tani calls in former criminal Gerard Hirsch, who is knowledgeable in art, to assist in the case. Meanwhile, Junior lends a hand to his father on the anniversary of his sister's death. Tani tries to reach out to Junior about his father but has no luck.
213	20	"Ke ala o ka pu" "Way of the Gun"	David Straiton	Paul Grellong	April 5, 2019 (2019-04-05)	920	6.84
McGarrett and the rest of the Five-0 members reminisce about the memories of a .38 caliber, a "community gun", used in multiple homicides while investigating the latest homicide involving a teen girl who purchased the gun from a junkie. The gun was found to be connected to multiple Five-0 members, the same gun was used to kill Duke's former partner, in a cold case of Steve's dad, a robbery Danny responded to right after he moved to the island, and was used by Tani's ex-boyfriend who was a gang banger.
214	21	"He kama na ka pueo" "Offspring of an Owl"	Jerry Levine	David Wolkove & Matt Wheeler	April 12, 2019 (2019-04-12)	921	6.87
The Five-0 task force investigates a murder of a private investigator who was getting close to solving a 20-year-old cold kidnapping case. Meanwhile, when McGarrett and Danny borrow an apartment to run surveillance, they find that one of their victims from a previous case has passed and are left with her cat.
215	22	"O ke kumu, o ka mana, ho'opuka 'ia" "The teacher, the pupil-let it come forth"	Brad Turner	Rob Hanning & Ashley Dizon	April 26, 2019 (2019-04-26)	922	6.62
Five-0 investigates the murder of an undercover FBI agent. Adam has a special connection with the case as the victim was about to be married to a Yakuza boss's daughter. Meanwhile, Noelani is kidnapped and forced to assist her former mentor in performing life-saving surgery on a criminal boss, only to find out her former mentor turns out to be working with the criminal boss and is shot and killed.
216	23	"Ho'okahi no la o ka malihini" "A stranger only for a day"	Gabriel Beristain	Zoe Robyn	May 3, 2019 (2019-05-03)	923	6.77
McGarrett helps his visiting sister Mary, who is on vacation, spy on her shady neighbors. When Mary breaks into the neighbors' house, her and Steve find a basement full of weapons and dangerous chemicals. Meanwhile, Five-0 investigates the murders of a ride-share driver and his passenger. Also, the team teases the youngest members of Five-0 when Junior escorts Tani to a wedding.
217	24	"Hewa ka lima" "The hand is at fault"	Peter Weller	Paul Grellong & Sean O'Reilly	May 10, 2019 (2019-05-10)	925	6.78
When Aaron Wright begins working for the NSA, he turns to Five-0 for assistance when his co-workers are murdered. Five-0 begins investigating and finds a world of blackmails and murders, only for Adam and Jerry to figure out that Aaron tricked them into helping him. The two, along with Steve, attempt to contact his boss, agent Flores, for help but Aaron shoots Flores and escapes. Meanwhile, Lou helps out his brother Percy when someone begins stealing his recipe, only to find that Flippa wants to set up in business with Percy.
218	25	"Hana Mao 'ole ka ua o Waianae" "Endlessly Pours the Rain of Waianae"	Eagle Egilsson	Matt Wheeler & David Wolkove	May 17, 2019 (2019-05-17)	924	5.11
Five-0 begins searching for Aaron Wright and runs into many dead-ends in the process. Aaron is later taken into custody and, in exchange for leniency, assists in finding the deadly weapons he sold. Meanwhile, Junior begins searching for his father after he and his gun go missing. Later, the wife of the man who killed Joe White and the rest of McGarrett's SEAL team opens fire in the Five-0 office with McGarrett and Jerry in the line of fire.

Season 10 (2019–20)

Main article: Hawaii Five-0 (2010 TV series, season 10)

No. overall	No. in season	Title	Directed by	Written by	Original air date	Prod. code	U.S. viewers (millions)
219	1	"Ua ʻeha ka ʻili i ka maka o ka ihe" "The skin has been hurt by the point of the spear"	Duane Clark	Story by: Peter M. Lenkov Teleplay by: David Wolkove & Matt Wheeler	September 27, 2019 (2019-09-27)	1002	7.03
In the Five-0 offices, Lou kills Azra, Omar Hassan's wife, but not before Jerry is shot by her. While recovering at a hospital, Jerry begins thinking about moving on to other things and leaves the team later. While off duty, Junior and Tani witness a murder-for-hire hit on a Chinese triad leader, but the hitman escapes. They then find out that military police officer Quinn Liu is also looking for the suspect. The team tracks a stolen car to a warehouse, but the hitman commits suicide before they can arrest him. Adam meets with Yakuza leaders to figure out who is behind the hits, but the hitman's accomplice arrives and attempts to kill Masuda, one of the leaders. Afterwards, Steve asks Quinn to pursue the case further, after no charges are pressed due to lack of evidence. Lastly, an unknown figure is seen putting a small explosive in Steve's tool box from his father. Note: This is the first episode to feature Katrina Law as a series regular and the last episode to feature Jorge Garcia as a main cast member.
220	2	"Kuipeia e ka makani apaa" "Knocked flat by the wind; sudden disaster"	Karen Gaviola	Talia Gonzalez & Bisanne Masoud	October 4, 2019 (2019-10-04)	1003	6.56
Tani and Junior get inadvertently trapped while trying to save civilians inside a tunnel collapse. McGarrett discovers that the collapse was an intentional plot for Jackson Wilcox, the most notorious methamphetamine dealer outside of Mississippi, to escape. With Quinn's help, Five-0 discover that the van Wilcox was transported in belonged to the Department of Defense, but was actually used by the FBI to bring Wilcox from a safe house to treat his cancer. After a bomb is discovered in his home, McGarrett calls the bomb squad to investigate, but they don't get any clues of who could have planted it.
221	3	"E uhi ana ka wa I hala I na mea I hala" "Passing time obscures the past"	Brad Turner	Matt Wheeler & David Wolkove	October 11, 2019 (2019-10-11)	1004	7.09
Five-0 investigates the murder of diver Jay Kahale who was discovered inside the wreckage of downed airliner flight 912 from 1983. The team discover conspiracy theories about the crash online. Lou and Tani talk to one member of the sites, Tim Pollock, who reveals that someone under a username has fueled conspiracies about the crash and is considered to have published about 80% of it. Quinn is arrested by military police for money-laundering after being offered to join Five-0. After McGarrett confronts Cullen, his house explodes with him inside, killing Cullen.
222	4	"Ukuli'i ka pua, onaona i ka mau'u" "Tiny is the flower, yet it scents the grasses around it"	Peter Weller	Zoe Robyn	October 18, 2019 (2019-10-18)	1006	6.34
Five-0 investigates the suspicious attempted kidnapping of high-school student Yumi Chun, whom they later discover is actually a North Korean agent who was deployed to Hawaii to bring back a defector, Jae-Sung. With the help of Aaron Wright, they manage to stop Chun from releasing classified black site documents from an army general. McGarrett brings Eddie to the vet after being attacked by another dog in the dog park, and later goes on a date with the vet who treated Eddie, Emma Okino.
223	5	"He 'oi'o kuhihewa; he kaka ola i 'ike 'ia e ka makaula" "Don't blame ghosts and spirits for one's troubles; a human is responsible"	Yangzom Brauen	Rob Hanning & Zoe Robyn	October 25, 2019 (2019-10-25)	1005	6.70
Halloween in Hawaii has Five-0 working two cases, a murder of an elderly woman, Edith Lahela who was murdered in an attempted robbery gone wrong and the discovery of the body of a disappearance victim, Lana Nakua. Grover, Adam, and Tani discover that Edith Lahela was a nun for over 20 years and had adopted the son of Mother Superior Decosta, Kimo, who she locked in the safe in her basement to protect him from the outside world because of his deformity. With the help of Max Bergman, who has returned for a visit from Africa with his adopted son Tunde, they get Kimo to stand down with also bringing Decosta to convince him. Steve and Junior discover that someone stole Lana Nakua's body from the morgue, and later find two of the original suspects in her case, Todd Hughes and Remy Mitchell, murdered in their homes with Nakua's initials written in blood near them. They conclude that given that the third suspect, Zach Wyatt, has not been found murdered and that he is the killer and the one who orchestrated the theft of Lana's body.
224	6	"A'ohe pau ka 'ike i ka halau ho'okahi" "All knowledge is not learned in just one school"	Karen Gaviola	Duppy Demetrius	November 1, 2019 (2019-11-01)	1007	7.13
Five-0 works two cases, one of an autonomous vehicle that was carrying cocaine that was involved in a hit and run, and the second of an elderly woman murdered in her apartment. Steve, Danny, Grover, Junior, and Adam discover that the autonomous vehicles belonged to a tech company run by Julia Wahea, and whoever utilized her vehicles used her login to access them. Tani and Quinn investigate the case of the murdered elderly woman. Social media influencers Scooter and Skeez ride-along in the process of making an HPD recruitment video. Though reluctant to let them help at full scale, they allow assistance to a certain degree. Scooter and Skeez's recruitment video is later a success.
225	7	"Ka 'i'o" "DNA"	Alex O'Loughlin	Alex O'Loughlin	November 8, 2019 (2019-11-08)	1001	7.13
A CIA operative meets with Five-0 and tells them that another CIA operative was found dead in Mexico with a bullet matching Doris' service issued weapon. Steve is ordered to go to Mexico alone to find her as well as kill a powerful cartel leader. Meanwhile, while in Mexico, Junior tracks Steve using security cameras and goes to assist him. After infiltrating a storage facility of the drug cartel leader Steve and Junior find Doris. However, before he can talk her into coming with them, Steve is shot and Doris is fatally stabbed by the cartel leader. It is revealed that Doris had set up the cartel leader, successfully completing a deep-cover mission for the U.S. government.
226	8	"Ne'e aku, ne'e mai ke one o Punahoa" "That way and this way shifts the sand of Punahoa"	Carlos Bernard	Chi McBride & Matt Wheeler	November 15, 2019 (2019-11-15)	1008	7.36
Five-0 investigate the hijacking of a medevac helicopter. Quinn and Tani manage to track down an address from a burner phone he bought. They and Steve arrive at the address where they find DEA agent Richie Gormican, who is looking for the same culprit whose name is Ben Tam. Tam was on a small plane carrying $10 million worth of heroin, which they also learn is connected to Sam Bishop, Wes Cullen's associate. Adam and Junior, along with Eddie, search the jungle and find the plane and the heroin. McGarrett's suspicions about Gormican are proved when Five-0 learn that he was suspended by the DEA, had worked with Tam, and is in the middle of completing his drug deal with a Serbian gang. Separately, Lou's niece, Siobhan, comes to visit Hawaii to enroll for a basketball scholarship at the UH, but concerns of her past dealings with a gang in Chicago raises concerns. Lou later discovers that Siobhan had always wanted to be a cop since she was five years old and that she had saved a friend at school from a gang member, which was why she was expelled. At the hospital, Sam Bishop, who remains unconscious, is murdered.
227	9	"Ka la'au kumu 'ole o Kahilikolo" "The trunkless tree of Kahilikolo"	Ron Underwood	Paul Grellong & Noah Evslin	November 22, 2019 (2019-11-22)	1010	7.33
Thanksgiving in Hawaii has Five-0 investigating the murder of philanthropist George Parks, who seemed to have fallen witness to a robbery on his own property. The case takes an odd turn when they discover that a koa tree is what was stolen. Upon arriving at the suspected address, they find the robbers dead with the wood still with them. Junior and Tani investigate a robbery at his parents' house, and discover that the robber stole his father's Purple Heart medal which he had hid. Junior suspects his childhood best friend Owen Ocampo, who is revealed to actually have done it, but didn't pawn the Purple Heart, not forgetting his friendship with Junior. He later accepts Junior's offer to go to rehab. Junior invites his parents to the Thanksgiving celebrations at McGarrett's house.
228	10	"O 'oe, a 'owau, nalo ia mea" "You and me; it is hidden"	Kristin Windell	Paul Grellong & Rob Hanning	December 6, 2019 (2019-12-06)	1009	6.55
Five-0 is faced with the seemingly unconnected triple murders of a chef, boat captain, and a photographer. Upon investigation, the team deduces that the murders are connected to the murder of a banker ten years prior. Lou and Tani look into the HPD report from the banker's murder, and discover that all three victims had told the police that they never saw anything. Five-0 suspects that one of the three had gotten cold feet and wanted the truth to come out. Meanwhile, Adam and Masuda-San both work to save Tamiko, who has been kidnapped. Though Tamiko returns safely, her father is shot and dies en route for treatment. Adam confronts Kenji only for Kenji to threaten to reveal Adam's role which would see his Five-0 career ruined. Despite Adam's pleas, Kenji then murders the Filipino gang member Adam had abducted and brought to Masuda, whom Masuda-San had tortured. Horrified by the cold-blooded execution, Adam then answers a phone call from Steve and agrees to see him at the office straightaway. Unbeknown to Adam, Duke had learned that he was the one who had attacked the Filipino gang and abducted one of them, and Duke has given Steve the information.
229	11	"Ka i ka 'ino, no ka 'ino" "To return evil for evil"	Karen Gaviola	Kendall Sherwood	December 13, 2019 (2019-12-13)	1011	6.57
Continuing from the previous episode, Adam arrives at the Five-0 HQ and is confronted by Steve and Duke about his involvement in the robbery of the Filipino gang. Adam hands his badge and gun, resigning from the task force and refusing to tell Steve the truth. Meanwhile, the team investigates a helicopter attack which is revealed to have been shot down by a rocket launcher. Digging deeper, they learn that the pilot and founder, Jordan Notua, had turned off the helicopter's transponder over a no-fly zone for the Hawaii state bird. Searching the area, Steve and Danny discover that someone professional has gunned down a mansion's guards and stolen hidden weapons. They learn that the suspect is Daiyu Mei, unknowingly to them that she is Wo Fat's wife, who has continued his work of selling weapons. In the real location, Mei is making a weapons sale, but turns on the buyers and shoots them. She tells the survivor that she will call an ambulance for him, provided he passes on a message to McGarrett that she is Wo Fat's wife.
230	12	"Ihea 'oe i ka wa a ka ua e loku ana?" "Where were you when the rain was pouring?"	Katie Boyum	Story by: Peter M. Lenkov Teleplay by: David Wolkove	January 3, 2020 (2020-01-03)	1013	8.06
McGarrett and the task force track down a suspect who might be connected to the stolen list of undercover CIA agents. When the suspect gets away, the task force runs into Thomas Magnum (Jay Hernandez) and his partner, Higgins (Perdita Weeks) discovering that they are looking for the same suspect for a client they are looking after. McGarrett reluctantly begins working together to try to find the stolen list. Meanwhile, Tani reaches out to Adam concerning his well-being only for Adam to flee Hawaii. Tani asks Junior out on a date. This episode begins a crossover event that concludes on Magnum P.I. season 2 episode 12.
231	13	"Loa'a pono ka 'iole i ka punana" "The rat was caught right in the nest"	Antonio Negret	Kendall Sherwood & Chris Wu	January 10, 2020 (2020-01-10)	1012	7.75
While on a round of golf at a luxurious country club, Grover gets roped into a murder of a man found frozen in a nitrogen cool steamer room. Grover is immediately asked to do the case quietly to not damage the club's reputation. Meanwhile, McGarrett comes to Danny's side when the latter finds out that Charlie has been getting bullied at school and not telling him. Also, Adam faces a huge decision of loyalty between Five-0 and the Yakuza. Tani receives shocking news that Junior had been recalled to active duty.
232	14	"I ho'olulu, ho'ohulei 'ia e ka makani" "There was a lull, and then the wind began to blow about"	Peter Weller	Story by: Peter M. Lenkov Teleplay by: Paul Grellong	January 31, 2020 (2020-01-31)	1014	7.56
At a local bar, Danny meets a woman, Joanna, with whom he gets to know and share few things in common with. On the way home, they encounter an oncoming car that almost collides with them, but end up crashing in the ditch after Danny tries swerving out of the way. The unnamed woman is critically injured and loses much blood. Danny tends to her wounds while also trying to flag the attention of passerby. By the time a rescue team arrives, the woman has already died. Meanwhile, Steve gets Eddie checked by the vet after he wanders into traffic. The vet concludes that Eddie is suffering from PTSD after having supposedly experienced some kind of traumatic event in his life. Steve to bring Eddie to a military doctor, who further confirms Eddie's PTSD. Steve, Quinn, and Tani start digging into Eddie's past service record with Marines who served in Afghanistan. They learn that Eddie had watched his original handler getting killed by a bomb and a sort of purple flowers in the grass had triggered him. In the midst of everything, Adam makes his return to Hawaii.
233	15	"He waha kou o ka he'e" "Yours is the mouth of an octopus"	Ian Anthony Dale	Matt Wheeler & Chi McBride	February 7, 2020 (2020-02-07)	1015	6.69
Following his car accident, Danny meets Leslie, Joanna's sister (the woman he met in the previous episode), and apologizes to her, but she doesn't blame him for her death and reassures him that he did everything he could. Tani stands in as an instructor at the HPD academy but is also checking on Siobhan, Grover's niece. After shooting practice, Siobhan expresses to Tani that she thinks her boyfriend, fellow recruit Endo Tanaka, is cheating on her and that he has two phones. That night, Siobhan drives to Endo's house, but he tells her he is out with a friend. Regardless, Siobhan decides to investigate the house and overhears Endo speaking to a Yakuza member, before getting revealed and kidnapped. Five-0 investigate Siobhan's kidnapping, subsequently having HPD intercept Endo after he is told by Kenji Higashi to continue his day as normal. Grover doesn't believe Endo's story about Siobhan supposedly committed suicide. Realizing he put himself in a bad situation, Adam decides to do good by exchanging Endo for Siobhan with the Yakuza.
234	16	"He kauwa ke kanaka na ke aloha" "Man is a slave of love"	Jerry Levine	Rob Hanning	February 14, 2020 (2020-02-14)	1016	6.95
Valentine's Day has Five-0 investigate the murder of Thai diplomat Prin Khomsiri who was allegedly killed by his own wife, Lorena Massey who confessed to the murder and is brought into HPD custody. Danny doubts that she actually committed the murder, citing his prior experience with domestic abuse cases to back him. The case gets more complicated as the State Department gets involved and wants to keep the case out of the public spotlight. Documents from the State Department reveals that Lorena's citizenship has been revoked and is due to be sent to Thailand for a trial for her husband's murder. McGarrett and Five-0 remain convinced that Lorena didn't kill her husband, and Danny brings her to a safe house owned by Kamekona, but the State Department gets to them and has him and Lorena arrested. In other matters, Noelani and Tani are taken hostage at a convenience store when a Bonnie and Clyde couple attempt a robbery. However, the man collapses after having a seizure, and Noelani assist medically and Tani manages to convince the wife to surrender for the sake of her husband getting proper medical treatment.
235	17	"He kohu puahiohio i ka ho'olele i ka lepo i luna" "Like a whirlwind, whirling the dust upward"	Karen Gaviola	Paul Grellong & Matt Wheeler	February 21, 2020 (2020-02-21)	1017	6.66
Five-0 investigates a series of murders that are tied to an unpublished manuscript for the last Deerdie Naismith novel by Maureen Townsend. All of the crime scenes are replicated according to the manuscript, and Five-0 is assisted by Maureen Townsend expert Suzane Ridge (Suzanne Cryer). After inspecting a pen owned by Ridge, McGarrett finds a tracker inside it and the team digs into an event in Minneapolis that Ridge attended, where she got the pen from a fellow Maureen Townsend fan, Colin Hansen. Hansen is however, revealed to be the third victim, and McGarrett and Danny discover that Ridge is the fourth victim after they find her submerged in her hotel bathtub. Junior returns from his duty abroad and starts a relationship with Tani. They assist Harry Langford (Chris Vance) after his public actor Gabe is kidnapped. The kidnappers want to transfer Langdon's 10 million dollars to their account in the Cayman Islands. Also, Adam expresses worry to Kenji after Endo and Haru go missing. Kenji doesn't offer him much, other than that they were both sent on a plane back to Japan. While Adam discovers that Kenji had both Endo and Haru killed, masked men prepare to enter his apartment complex.
236	18	"Nalowale i ke 'ehu o he kai" "Lost in the sea sprays"	Tate Donovan	Story by: Zoe Robyn Teleplay by: Talia Gonzalez & Bisanne Masoud	February 28, 2020 (2020-02-28)	1018	6.81
Continuing from the previous episode, Adam shoots Kenji's men as they enter his apartment and Lou arrives with a SWAT team soon afterwards. Adam tells Lou that he has key evidence that will bring the Hawaiian faction of the Yakuza to justice. With help from Lou and Junior, Adam is able to arrest Kenji. With assistance from Rick Wright (Zachary Knighton), Five-0 investigates the murder of a captain onboard a cargo ship after it was boarded by pirates. When they reach the pirates' base of operations, they find them dead after having taken an unknown substance disguised as heroin. Also, in Maui, Noelani enlists the help of Quinn when she suspects that her uncle Akumu did not die of a heart attack after discovering a rash on one of his arms that indicate carbon dioxide poisoning. She and Quinn learn that Eke Mohoe had asked the coroner to report that Noelani's uncle died of a heart attack to not bring shame to the kids he (Akumu) helped out from gangs. However, one of the kids tells them that Councilman Mikala was behind it all, and Noelani deduces that he killed her uncle to eliminate him as a threat to his illegal dealings.
237	19	"E ho'i na keiki oki uaua o na pali" "Home go the very tough lads of the hills"	Geoff Shotz	Noah Evslin & Rob Hanning	March 6, 2020 (2020-03-06)	1020	6.98
Five-0 investigates the murder of rancher Daniel Kalakua after he was dragged by horses across his field. They later discover that he was murdered after he uncovered human skeletons on his property. The remains are revealed to be those of the previous owners, who were buried with gold coins. McGarrett deduces this was why their murdered rancher was celebrating at the local bar because he had finally discovered gold to pay his debt. Meanwhile, Quinn's former stepdaughter, Olivia (Siena Agudong), reaches out to her for help after her father doesn't come home. Quinn enlists Adam and Kamekona's help to find her ex-husband Jake, who is known to go out gambling. Quinn and Adam find Jake at another gambling location, where Quinn has him arrested for illegal gambling and threatens to revoke his custody of Olivia.
238	20	"He puhe'e miki" "A gripping cuttlefish"	Andi Armaganian	Kendall Sherwood & Chris Wu	March 13, 2020 (2020-03-13)	1019	7.11
The Five-0 team investigates a robbery-turned-murder of Chicago tourist Greg Dean, whose car was stolen. They discover that the theft of the car is reminiscent of the "Fix-a-Flat" robberies, which had the robbers steal tourists' rental vehicles from Honolulu Airport. They conclude that their robbers utilized the same strategy, but are puzzled because the theft was allegedly committed to stealing Dean's wife's ring after they find her in the woods nearby. They later learn that Greg Dean was protecting a suitcase before he was killed when they find it in their perpetrators' house. It is revealed that a Samoan gang was after Dean's suitcase and that they have his wife, Cynthia. Meanwhile, Tani helps Gerard Hirsch when it appears his uncle has committed a murder. Determined that his uncle is innocent, Hirsch almost gives in when his uncle's friend, who dealt with pawning, reveals that he knew that Tabitha May's housekeeper was shot in the eye, something that only the police and killer would know. Also, McGarrett receives a call informing him his mother hired an English lawyer to hand-deliver a package to him four months after her death.
239	21	"A ʻohe ia e loaʻa aku, he ulua kapapa no ka moana" "He cannot be caught for he is an ulua fish of the deep ocean"	Roderick Davis	Peter M. Lenkov & David Wolkove	March 27, 2020 (2020-03-27)	1021	8.44
Continuing from the previous episode, the English lawyer arrives in Hawaii and makes his visit short by handing McGarrett the "package" that Doris left for him, which is a letter containing a cipher. McGarrett and the Five-0 task force investigate a botched home invasion/attempted kidnapping, where a good samaritan stepped in and killed one of the robbers and saved a mother and her son. The case takes a dramatic turn when the good samaritan, Lincoln Cole, who stopped the robbers, turns out to be an ex-marine gone AWOL. The brother of the deceased robber, Hector Acosta, seeks revenge on Cole for his brother's murder, and has the mother and son that he rescued earlier, recaptured in exchange for himself. Cole is taken into Five-0 custody for his own protection, and McGarrett learns why he went AWOL. Meanwhile, Danny and Tani are worried about McGarrett after he received the cipher from Doris. On the other hand, McGarrett contemplates leaving Five-0.
240	22	"Aloha" "Goodbye"	Duane Clark	Story by: Peter M. Lenkov Teleplay by: David Wolkove & Matt Wheeler	April 3, 2020 (2020-04-03)	1022	9.59
Steve and Lincoln head to meet Marshall, the guy Lincoln got to solve the cipher, Danny calls Steve and says that someone is tailing him. The two go to assist and when they find Danny's car, they find he has been kidnapped. Daiyu Mei contacts Steve and says she will trade the cipher for Danny's life. Steve meets Daiyu Mei and gives her the cipher, in exchange he gets the address of Danny's location. Danny breaks free but is shot on his way out. Five-0 rushes Danny to the hospital. Lincoln finds out the cipher were coordinates which Steve recognizes to be the grave of Doris when she faked her death. Five-0 finds that the grave was full of cash and Daiyu Mei's associates emptied it out. Facial recognition allows Five-0 to track their location. Daiyu Mei is ultimately arrested. It is revealed that Steve is leaving the island, Steve and Danny share their goodbyes. Steve says bye to Eddie and the rest of Five-0 shows up to say goodbye. Steve puts Lincoln in charge of the Five-0 task force before leaving. Catherine Rollins joins Steve on the plane and reveals she is the one who solved the cipher.

See also

• NCIS (franchise)
• List of NCIS episodes
• List of NCIS: Los Angeles episodes episodes
• List of NCIS: New Orleans episodes episodes
• List of NCIS: Hawaiʻi episodes

External links

• Official website
• Hawaii Five-0 at IMDb
• List of Hawaii Five-0 episodes at The Futon Critic
• Hawaii Five-0 at epguides.com