Season 8

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The eighth season of Hawaii Five-0 premiered on September 29, 2017 on CBS and concluded on May 18, 2018. The season consisted of 25 episodes.

Main Cast

 * Alex O'Loughlin as Commander Steve McGarrett
 * Scott Caan as Detective Danny Williams
 * Ian Anthony Dale as Adam Noshimuri
 * Meaghan Rath as Tani Rey
 * Jorge Garcia as Jerry Ortega
 * Beulah Koale as Junior Reigns
 * Chi McBride as Lou Grover
 * Dennis Chun as Sergeant Duke Lukela
 * Taylor Wily as Kamekona Tupuola
 * Kimee Balmilero as Dr. Noelani Cunha

Recurring characters

 * Paige Hurd as Samantha Grover
 * Andrew Lawrence as Eric Russo
 * Claire Forlani as Alicia Brown
 * Michelle Krusiec as Michelle Shioma
 * Christine Ko as Jessie Nomura
 * Chosen Jacobs as William Grover
 * Zach Sulzbach as Charles Williams
 * Kunal Sharma as Koa Rey
 * Michael Imperioli as Odell Martin
 * Shawn Mokuahi Garnett as Flippa Tupuola
 * Shawn Anthony Thomsen as Pua Kai
 * Vincent Pastore as Vito Russo
 * Kekoa Kekumano as Nahele Huikala
 * Susan Park as Noriko Noshimuri

Guest Stars

 * Lili Simmons‏‎ as Melissa Armstrong
 * Claire van der Boom as Rachel Edwards
 * Joey Lawrence as Aaron Wright
 * Randy Couture as Jason Duclair
 * Jimmy Buffett as Frank Bama
 * Michelle Borth as Catherine Rollins
 * Erika Brown as adult Grace Williams
 * Joey Defore as adult Charlie Williams (20 years-old)
 * Bob McCracken as DEA Agent Chris Reid
 * Casper Van Dien as Roger Niles
 * Steven Brand as John Walcott
 * Derek Mio as Derek Okada
 * Robyn Lively as Helen Meech
 * Will Yun Lee as Sang Min
 * Chris Vance as Harry Langford
 * Terry O'Quinn as Joe White
 * Leonardo Nam as Harley Taylor
 * Reggie Lee as Joey Kang
 * Devon Sawa as Brad Woodward

Spoilers

 * Season 8 Spoilers

Casting

 * Daniel Dae Kim (Chin Ho Kelly), Grace Park (Kono Kalakaua) and Masi Oka (Max Bergman) are not returning as their main characters in season 8.
 * Ian Anthony Dale has recurred on H50 as Adam Noshimuri since season two, becoming a trusted confidant and resource for the team who will now be recruited by McGarrett to work for Five-0. This summer, Dale is starring in the suspense thriller Salvation, on the Network.
 * Meaghan Rath will play Tani Rey, who McGarrett recruits after finding her working as a lifeguard at a hotel pool after she was kicked out of the Police Academy, despite being a first-rate candidate.
 * Beulah Koale will portray Junior Reigns, a former Navy SEAL who just returned from serving his country and asks McGarrett, a fellow SEAL, for a job, hoping to re-purpose his skills as a member of Five-0.
 * Taylor Wily, Dennis Chun and Kimee Balmilero is upgraded from recurring to regular series.
 * Michael Imperioli, Claire van der Boom, Jimmy Buffett and Michelle Borth would return from their guest appearance in this season.