Hawaii Five-0 (2010 TV series) season 4

The fourth season of the CBS crime drama series Hawaii Five-0 premiered on Friday, September 27, 2013 and concluded on May 9, 2014. The season consisted of 22 episodes.

Main cast

 * Alex O'Loughlin as Lieutenant Commander Steven "Steve" McGarrett, United States Naval Reserve
 * Scott Caan as Detective Daniel "Danno" 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, United States Navy (retired), later Five-0 member
 * Chi McBride as HPD Captain Lou Grover

Recurring

 * Taylor Wily as Kamekona
 * Dennis Chun as HPD Sergeant Duke Lukela
 * Ian Anthony Dale as Adam Noshimuri
 * Teilor Grubbs as Grace Williams
 * Shawn Mokuahi-Garnett as Flippa
 * Justin Bruening as Lieutenant Commander William "Billy" Harrington, United States Navy (retired)
 * Brian Yang as Charlie Fong
 * Richard T. Jones as Governor Sam Denning
 * Jorge Garcia as Jerry Ortega

Guest stars
• Mark Dacascos as Wo Fat

• Autumn Reeser as Dr. Gabrielle "Gabby" Asano

• Terry O'Quinn as Lieutenant Commander Joe White, United States Navy (retired)

• Rumer Willis as Sabrina Lane

• Taryn Manning as Mary Ann McGarrett

• Nick Jonas as Ian Wright

• Henry Ian Cusick as Ernesto

• Nestor Serrano as El Condor

• Tim Daly as Ray Harper

• Wild Oak Will as Ellis Gregory

• Briana Lane as Dahlia Swaine

• Lacey Beeman as Abbie Maxwell

• Kenneth Matepi as William Ellery

• Yosef Kaznetzkov as Brock Upton

• Daryl Hannah as Cherie Tranton

• Brian Tee as Hideaki Kuroda

• Xzibit as Jason Dekker

• Louis Ozawa Changchien as Sato

• Tom Hintnaus as Dante Barkov

• Carol Burnett as Deb

• Zay Harding as Matt Haley

• James Saito as David Toriyama

• Jack Axelrod as Ezra Clark

• James Urbaniak as Gary Nathan

• Heather Dubrow as Emily

• Karl Makinen as Jack Anderson

• Lili Simmons as Amber Vitale

• Robert Knepper as Internal Affairs Officer Coughlin

• Reiko Aylesworth as Malia

• Christopher Sean as Gabriel Waincroft

• Michael Madsen as Roy Parish

• Lyndon Smith as Lauren Parish

• Matthew Glave as Julian Lynch

• Ethan Embry as Shawn Hutten

• Melanie Griffith as Clara Williams

• Elaine Tan as Zi Chen

• Conor Leslie as Kelly Donovon

• Booboo Stewart as Tommy Fa'aloa

• James Brennan as Sam Connors

• Peter Shinkoda as Alan Kim

• Mackenzie Astin as Bradley Richmond

• David Gautreaux as Edward Cobb

• Sasha Pieterse as Dawn Hatfield

• Mido Hamada as Amir Khan

• Farshad Farahat as Umar Hassan

• Paige Hurd as Samantha Grover

• Richard Burgi as Novak

• Duane "Dog" Chapman as himself

• Bryan Anderson as Kirk Emerson

Episodes
The number in the "No. overall" column refers to the episode's number within the overall series, whereas the number in the "No. in season" column refers to the episode's number within this particular season. The titles of each episode are in the Hawaiian language, though its English translations are directly underneath. "Production Code" refers to the order in which the episodes were produced. "U.S. viewers (millions)" refers to the number of viewers in the United States in millions who watched the episode as it was aired.

Development
On March 27, 2013, while the third season was still airing, CBS renewed Hawaii Five-0 for a fourth season. When CBS announced its fall schedule for the 2013-14 television season it was revealed that the series would undergo a time slot change moving from Monday nights at 10 PM ET to Friday nights at 9 PM ET. The season premiere aired on September 27, 2013. For the fourth season production of the series moved to a sound stage at Diamond Head Film Studios where the original Hawaii Five-O and Magnum, P.I. as well as Lost previously filmed at. Filming on the season began on July 9, 2013 with a traditional Hawaiian blessing. On October 11, 2013, it was announced that the show was planning a "fan built episode." Fans and viewers of the series were able to vote on several plot elements of the show including the scene of the crime, the victim, the murder weapon, the suspect, and the scene of the takedown. Once production began fans were also able to vote for additional elements such as props, cast wardrobe, music, and the episode title. The episode aired as the season's eighteenth episode on April 4, 2014.

Casting
On June 14, 2013, it was announced that Jorge Garcia would guest star in an episode early on in the season. It was also announced that Chi McBride had been cast in a guest role to play character from the original series, Captain Lou Grover; with the possibility of the role to later become recurring. Tim Daly was confirmed to be guest starring in an episode as a Texas Ranger also with the possibility for the role to become recurring. It was reported that Henry Ian Cusick would guest star in the season's premiere episode as a character called Ernesto, a member of a terrorist group called the National Liberation Movement. Nick Jonas also guest starred in one episode as computer hacker Ian Wright. After appearing in multiple episodes as a recurring character it was revealed that McBride would be upped to a series regular for the remainder of the season. McBride began receiving main billing in the tenth episode of the season, "Hoʻonani Makuakane". Jonas later reprised his role once again in the season finale. Mark Dacascos also reprised his role as Wo Fat in the seasons premiere and finale episodes. Garcia quickly became a recurring character when he appeared in three more episodes later in the season. Due to the popularity of his character he was subsequently upgraded to a series regular beginning with the fifth season. On March 27, 2014 it was announced that Michelle Borth would depart the series at the end of the season. She made her final appearance as a series regular in the seasons penultimate episode. Borth has continued to make guest appearances in all subsequent seasons including a recurring role early in the sixth season.