Seasons & episodes
S4 · E1Aloha Ke Kahi I Ke Kahi (We Need Each Another) 2013-09-27 · 43 min
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.
S4 · E2A‘ale Ma‘a Wau (Fish Out of Water) 2013-10-04 · 44 min
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.
S4 · E3Ka ʻoiaʻiʻo ma loko (The Truth Within) 2013-10-11 · 44 min
A conspiracy theorist helps Five-0 when a missing artifact is the key to solving a double murder.
S4 · E4A Ia La Aku (From This Day Forward) 2013-10-18 · 44 min
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.
S4 · E5Kupu‘eu (Fallen Hero) 2013-10-25 · 44 min
As Catherine’s seemingly harmless surveillance job takes a deadly turn, Adam considers making the ultimate sacrifice to save Kono.
S4 · E6Kupouli ‘La (Broken) 2013-11-01 · 44 min
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.
S4 · E7Ua Nalohia (In Deep) 2013-11-08 · 44 min
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.
S4 · E8Akanahe (Reluctant Partners) 2013-11-15 · 43 min
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.
S4 · E9Hau‘oli La Ho‘omaika‘i (Happy Thanksgiving) 2013-11-22 · 44 min
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.
S4 · E10Ho‘onani Makuakane (Honor Thy Father) 2013-12-13 · 45 min
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.
S4 · E11Pukana (Keepsake) 2013-12-20 · 44 min
An investigation involving a potential serial killer puts Chin's life in danger; Grace and Danny find a mysterious puzzle box.
S4 · E12O Kela Me Keia Manawa (Now and Then) 2014-01-10 · 44 min
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.
S4 · E13Hana Lokomaika‘i (The Favor) 2014-01-17 · 42 min
Chin is questioned about his father's murder and how his relationship with Malia and her family could have adversely affected the investigation.
S4 · E14Na hala a ka makua (Sins of the Father) 2014-01-31 · 44 min
An escaped convict who wants Five-0 to prove his innocence abducts Danny and McGarrett; Grace punches a person at school.
S4 · E15Pale'la (Buried Secrets) 2014-02-28 · 44 min
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.
S4 · E16Hoku Welowelo (Fire in the Sky) 2014-03-07 · 43 min
A triple homicide is linked to a secret, downed Chinese satellite; Danny's mother goes on a ride-along with Grover.
S4 · E17Ma Lalo o ka ʻlli (Beneath the Surface) 2014-03-14 · 43 min
A man is shot as his daughter is abducted; Danny tries to reunite his parents; Jerry finds a code on McGarrett's champ box.
S4 · E18Ho‘i Hou (Reunited) 2014-04-04 · 44 min
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.
S4 · E19Ku I Ka Pili Koko (Blood Brothers) 2014-04-11 · 44 min
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.
S4 · E20Pe‘epe‘e Kānaka (Those Among Us) 2014-04-25 · 42 min
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.
S4 · E21Makani ʻOlu a Holo Malie (Fair Winds and Following Seas) 2014-05-02 · 44 min
McGarrett and Catherine travel overseas to Afghanistan to stop the Taliban from harming a young boy whose family saved Catherine's life years ago.
S4 · E22O ka Pili ‘Ohana Ka ‘Oi (Family Comes First) 2014-05-09 · 43 min
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.