Season 4

The Hawaii Five-0 team faces some of their biggest challenges yet as they fight to keep paradise safe from the most dangerous criminals on the island. This season, Steve McGarrett (Alex O'Loughlin) and Detective Danny "Danno" Williams (Scott Caan) pursue an expert hacker and are taken hostage by an escaped convict who convinces them of his innocence while the danger of Kono's (Grace Park) relationship with the son of a Yakuza boss escalates. Chin Ho (Daniel Dae Kim) is investigated by Internal Affairs about his ties to the head of a drug cartel and Catherine (Michelle Borth) gains a spot on the team but must repay a debt of honor in Afghanistan. Joining the team this season is Captain Lou Grover (Chi McBride) who recently moved his family from Chicago to head the SWAT unit on the island. It's high-octane action that never lets up through 22 thrilling episodes that will keep you on the edge of your seat.

Cast[]

Main Cast[]

Alex O'Loughlin as Commander Steve McGarrett
Scott Caan as Detective Danny Williams
Daniel Dae Kim as Lieutenant Chin Ho Kelly
Grace Park as Officer Kono Kalakaua
Masi Oka as Dr. Max Bergman
Michelle Borth as Lieutenant Catherine Rollins
Chi McBride as Lou Grover (as also starring)

Recurring characters[]

Ian Anthony Dale as Adam Noshimuri
Taylor Wily as Kamekona Tupuola
Dennis Chun as Sergeant Duke Lukela
Jorge Garcia as Jerry Ortega
Teilor Grubbs as Grace Williams
Brian Yang as Charlie Fong
Taryn Manning as Mary McGarrett
Autumn Reeser as Gabrielle Asano
Lili Simmons as Amber Vitale (later Melissa Armstrong)
Mark Dacascos as Wo Fat
Terry O'Quinn as Joe White
Christopher Sean as Gabriel Waincroft
Shawn Mokuahi Garnett as Flippa Tupuola
Shawn Anthony Thomsen as Pua Kai
Richard T Jones as Governor Samuel Denning

Guest Stars[]

Reiko Aylesworth as Dr. Malia Waincroft
Michelle Hurd as Renee Grover
Nick Jonas as Ian Wright
Daryl Hannah as Cherie Tranton
Tim Daly as Ray
Alvin "Xzibit" Joiner as Jason Dekker

[]

Episodes[]

Title	Written by	Directed by	Original air date	Production code
Aloha ke kahi I ke kahi	Peter M. Lenkov & Ken Solarz	Bryan Spicer	September 27, 2013	101
Season Premiere. With the NLM having stored the building where the H50 team's headquarters are, taking hostages, Steve and Danny face a battle on their hands and the stakes are raised when Catherine is kidnapped.
A'ale Ma'a Wau	John Dove	Joe Dante	October 4, 2013	102
The team investigate the murder of a man who work for a limo company and soon have a suspect: a highly-decorated Texas Ranger while Kono and Adam face a battle for survival after learning that their location has been compromised thanks to the events in the previous episode.
Ka 'oia'i'o ma loko	Steven Lilien & Bryan Wynbrandt	Duane Clark	October 11, 2013	103
The H50 team investigate the death of a young, wealthy couple who were both murdered in their swimming pool while Catherine prepares to retire from the Navy for good.
A ia la aku	Christina M. Kim & David Wolkove	Bryan Spicer	October 18, 2013	104
A wedding ends in turmoil when the bride-to-be flees while a wedding crasher later turns up dead. As the team investigate, they find evidence that the bride has a shady past while Danny makes a decision, one that could ultimately affect his relationship with Gabby.
Kupu'eu	Moira Kirland & Eric Guggenheim	Jeffrey Hunt	October 25, 2013	105
A routine surveillance job for Catherine and Billy ends in tragedy when they're both attacked by a hitman with Billy dying in hospital as a result of the injuries sustained in the fight, setting the H50 team on a search for the killer.
Kupouli ʻla	Sue Palmer & David Wolkove	John Terlesky	November 1, 2013	106
It's Halloween but the team aren't in the mood to celebrate as they search for a doctor who's performing illegal experiments on innocent people.
Ua Nalohia	John Dove & Noah Nelson (Story), Bradley Paul (Teleplay)	Joe Dante	November 8, 2013	107
The team investigate when a man is murdered and discover that the victim was an agent working undercover for ATF while playing babysitter to Mary's newly adopted daughter after Mary falls ill from food poisoning.
Akanahe	Steven Lilien & Bryan Wynbrandt	Jerry Levine	November 15, 2013	108
With Danny in New Jersey visiting his parents, Steve must partner with Captain Lou Grover of the HPD's SWAT team as they attempt to serve an arrest warrant to a young man, only discover the man is hiding a sinister secret.
Ha'uoli La Ho'omoaika'i	Eric Guggenheim & Moira Kirland	Allison Liddi-Brown	November 22, 2014	109
The H50 team investigate when the badly disfigured body of an agent attached to the United States Secret Service is found in a barrel of lye while Steve and Mary are stunned when their aunt arrives in Hawaii for Thanksgiving.
Ho'onani Makuakane	Peter M. Lenkov & Ken Solarz	Larry Teng	December 6, 2014	110
H50 investigate the attempted murder of a Pearl Harbor veteran and discover decades-old evidence concerning a horrific crime that took place at an Oahu internment camp during WWII.
Pukana	Bill Haynes	Bryan Spicer	December 13, 2013	111
The team's investigation into the murder of a burglar takes a turn after evidence emerges, suggesting that the burglar might have been the victim of a serial killer who is responsible for torturing and killing fourteen women and Chin finds himself fighting for his life after he's captured by the killer.
O kela me keia manawa	John Dove	Peter Weller	January 9, 2014	112
Steve helps Captain Lou Grover after one of Grover's friends apparently commits murder while Kono continues searching for Adam.
Hana Lokomaika'i	Peter M. Tassler (Story), Peter M. Lenkov & Ken Solarz (Teleplay)	Sylvain White	January 17, 2014	113
Internal Affairs question Chin about his relationship with Dr. Malia Waincroft. As this goes on, the team investigate the murder of a DEA agent.
Na Hala a ka makua	David Wolkove	Peter Weller	January 31, 2014	114
Steve and Danny are kidnapped by a criminal who wants them and the team to prove that he is innocent after being found guilty of killing a real estate manager.
Pale'la	Moira Kirkland	Jerry Levine	February 28, 2014	115
As the team investigate the murder of a real estate agent, Danny is left stunned when his mother arrives on the island, bringing with her troubling news.
Hoku Welowelo	Steven Lilien & Bryan Wynbrandt	Jeffrey Hunt	March 7, 2014	116
The team investigate when three innocent people are gunned down on a boat and discover that the killings may be connected to a downed satellite owned by the Chinese while Grover takes Danny's mother on a ride-along.
Ma lalo o ka ili	Bill Haynes (Story/Teleplay), John Dove (Teleplay)	Bryan Spicer	March 14, 2014	117
The team jump into action when a raid results in a young teenage girl being kidnapped and her father being shot dead while Danny attempts to bring his parents back together and Jerry finds a clue that could prove useful in Steve's investigation of Wo Fat.
Ho'i Hou	Christina M. Kim	Sylvain White	April 4, 2014	118
A woman is murdered at Chin and Jerry's high school reunion, prompting the team to investigate while Steve and Danny travel to Cambodia to investigate a grave site.
Ku I Ka Pili Koko	David Wolkove (Story), Steven Lilien & Bryan Wynbrandt (Teleplay)	Maja Vrvilo	April 11, 2014	119
Steve and Danny fight for their lives after being trapped in a building that is destroyed when a bomb explodes. With the time of the essence, Chin, Kono, Catherine and Grover must find a way to save the two men before it's too late.
Pe'epe'e Kanaka	John Dove	Jeff Cadiente	April 25, 2014	120
The team investigate when a pool cleaner is gunned down and discover that a terrorist cell composed of young American college students may be planning an attack on American soil.
Makani 'Olu a Holo Malie	Peter M. Lenkov & Ken Solarz (Story), Eric Guggenheim (Story/Teleplay)	Jeffrey Hunt	May 2, 2014	121
As the team tackle the case of a missing liver due for a lawyer, Steve and Catherine travel to Afghanistan to save a young boy who has been kidnapped by the Taliban but things take a turn for the worse when Steve winds up being captured by the same group of terrorists... This episode marks the final appearance of Catherine Rollins.
O ka Pili'Ohana ka 'Oi	Peter M. Lenkov & Ken Solarz	Bryan Spicer	May 9 2014	122
Season Finale. The team rush to Grover's aid when his teenage daughter is kidnapped by hacker, Ian Wright while Wo Fat escapes from prison with the intent of returning to Oahu.

Trivia[]

Chi McBride would recur in this series and later he is now also starring in episode 10.
Michelle Borth announced that she is leaving the series and the end of this season.
Nick Jonas and Tim Daly where both guest appearance in this season.

Seasons of Hawaii Five-0
Season 1 ♦ Season 2 ♦ Season 3 ♦ Season 4 ♦ Season 5 ♦ Season 6 ♦ Season 7 ♦ Season 8 ♦ Season 9 ♦ Season 10