S4 E1 - Aloha Ke Kahi I Ke Kahi (We Need Each Another)
After McGarrett and Wo Fat narrowly escape from maximum security, gunmen storm Five-0 headquarters, compromising Kono and Adam's secret location in Hong Kong and forcing McGarrett to break the law and turn on his own in order to find a kidnapped Catherine.
04 October, 2013720p
S4 E2 - A‘ale Ma‘a Wau (Fish Out of Water)
As the Five-0 team members investigate a murder, they are led to a Texas ranger who came to Hawaii to look for his daughter; Adam and Kono fight to stay alive.
11 October, 2013720p
S4 E3 - Ka 'oia' i' o ma loko (The Truth Within)
A conspiracy theorist helps Five-0 when a missing artifact is the key to solving a double murder.
18 October, 2013720p
S4 E4 - A Ia La Aku (From This Day Forward)
Five-0 investigates the murder of a wedding crasher, and their prime suspect is the runaway bride. Meanwhile, Danny makes a big decision regarding his relationship with Gabby.
25 October, 2013720p
S4 E5 - Kupu‘eu (Fallen Hero)
As Catherine’s seemingly harmless surveillance job takes a deadly turn, Adam considers making the ultimate sacrifice to save Kono.
01 November, 2013720p
S4 E6 - Kupouli ‘La (Broken)
When Halloween comes to Hawaii and a zombie-like man is shot, Five-0 races to stop a madman who is conducting experiments on humans.
08 November, 2013720p
S4 E7 - Ua Nalohia (In Deep)
While working the murder case of an undercover ATF agent, McGarrett and the Five-0 team are tasked with watching Mary’s newly adopted baby after she gets sick.
15 November, 2013720p
S4 E8 - Akanahe (Reluctant Partners)
McGarrett and Grover must work together to protect national security after they are tasked by the Governor to serve a warrant to a young computer hacker.
22 November, 2013720p
S4 E9 - Hau‘oli La Ho‘omaika‘i (Happy Thanksgiving)
As Thanksgiving approaches, Five-0 investigates the murder of a secret service agent just as the President travels to Oahu. Also, McGarrett's Aunt Deb visits, bringing with her a shocking secret.
13 December, 2013720p
S4 E10 - Ho‘onani Makuakane (Honor Thy Father)
The attempted murder of a Pearl Harbor veteran leads Five-0 to use decades old evidence to investigate a deadly crime committed within the internment camps on Oahu during World War II.
20 December, 2013720p
S4 E11 - Pukana (Keepsake)
An investigation involving a potential serial killer puts Chin's life in danger; Grace and Danny find a mysterious puzzle box.
10 January, 2014720p
S4 E12 - O Kela Me Keia Manawa (Now and Then)
Captain Grover is aided by McGarrett in his search for a friend who has disappeared, after it seems like he's committed murder. Kono persists in her quest to find Adam.
17 January, 2014720p
S4 E13 - Hana Lokomaika‘i (The Favor)
Chin is questioned about his father's murder and how his relationship with Malia and her family could have adversely affected the investigation.
31 January, 2014720p
S4 E14 - Na hala a ka makua (Sins of the Father)
An escaped convict who wants Five-0 to prove his innocence abducts Danny and McGarrett; Grace punches a person at school.
28 February, 2014720p
S4 E15 - Pale'la (Buried Secrets)
A real estate agent is found dead inside the walls of one of his listings. Meanwhile, Danny's mother makes an unexpected visit and brings with her some shocking news.
07 March, 2014720p
S4 E16 - Hoku Welowelo (Fire in the Sky)
A triple homicide is linked to a secret, downed Chinese satellite; Danny's mother goes on a ride-along with Grover.
14 March, 2014720p
S4 E17 - Ma Lalo o ka 'lli (Beneath the Surface)
A man is shot as his daughter is abducted; Danny tries to reunite his parents; Jerry finds a code on McGarrett's champ box.
04 April, 2014720p
S4 E18 - Ho‘i Hou (Reunited)
Fan-built Episode. Five-0 investigates when the daughter of a macadamia nut tycoon is murdered with a stiletto heel during Chin’s high school reunion.
11 April, 2014720p
S4 E19 - Ku I Ka Pili Koko (Blood Brothers)
Five-0 is set up when a bad tip leads them to an abandoned building that is rigged to explode with McGarrett and Danny trapped inside.
25 April, 2014720p
S4 E20 - Pe‘epe‘e Kānaka (Those Among Us)
The investigation of a murdered pool cleaner leads the Five-0 team to a possible terrorist cell of radicalized students plotting an attack on U.S. soil.
02 May, 2014720p
S4 E21 - Makani 'Olu a Holo Malie (Fair Winds and Following Seas)
McGarrett and Catherine travel overseas to Afghanistan to stop the Taliban from harming a young boy whose family saved Catherine's life years ago.
09 May, 2014720p
S4 E22 - O ka Pili ‘Ohana Ka ‘Oi (Family Comes First)
When Grover's daughter is kidnapped by an old nemesis, he is forced to help steal $100 million in order to get her back. Meanwhile, Wo Fat escapes prison and heads back to Oahu.
