The fifth season of the CBS crime drama series Hawaii Five-0 premiered on Friday, September 26, 2014, and concluded on May 8, 2015 with a two-hour season finale. There will be a season six. The season consisted of 25 episodes. Main cast; Alex O'Loughlin as Lieutenant Commander Steven InchSteveInch McGarrett, United States Navy Reserve, Scott Caan as Detective Sergeant Daniel InchDannoInch Williams, Honolulu Police Department, Daniel Dae Kim as Detective Lieutenant Chin Ho Kelly, Honolulu Police Department, Grace Park as Officer Kono Kalakaua, Honolulu Police Department, Masi Oka as Dr. Max Bergman, Chi McBride as Captain Lou Grover, Jorge Garcia as Jerry Ortega Recurring; Taylor Wily as Kamekona, Dennis Chun as HPD Sergeant Duke Lukela, Mark Dacascos as Wo Fat, Ian Anthony Dale as Adam Noshimuri, Teilor Grubbs as Grace Williams, Terry O'Quinn as Commander Joe White, United States Navy (retired), Brian Yang as Charlie Fong, Taryn Manning as Mary Ann McGarrett, Richard T. Jones as Governor Sam Denning, Shawn Garnett as Flippa, Shawn Thomsen as HPD Officer Pua Kai, Amanda Setton as Dr. Mindy Shaw, Mirrah Foulkes as ADA Ellie Clayton, Paige Hurd as Samantha Grover, Lili Simmons as Amber Vitale/Melissa Armstrong Guest stars; Greg Grunberg as Agent Morrison, Maa Tanuvasa as Sheriff Marcus Kalawaia, Alvin Joiner as Jason InchJCInch Dekker, Melina Kanakaredes as Kathy Millwood, Anna Belknap as Amy Lange, A. J. Buckley as Julius Brennan, Nick Jonas as Ian Wright, Michael Imperioli as Odell Martin, Jon Lovitz as Barry Burns, Mykelti Williamson as Clay, Kim Wayans as Diane, Pauly Shore as Jake Lockhard, Jaleel White as Nolan Fremont, Kevin Farley as Mickey Dickson, Robert C. Flores as USCG LT Young, Willie Garson as Gerard Hirsch, Claire van der Boom as Rachel Williams, Michelle Borth as Catherine Rollins

Scorpion is based on the true story of Walter O'Brien, an eccentric genius with the world's fourth-highest I.Q. and the creator of a company of brilliant misfits who use their mental muscle to defend the planet against complex high-tech threats of the modern age. In this high-octane thrill ride from the makers of InchStar Trek,Inch InchTransformers,Inch InchThe Amazing Spider-Man 2Inch and InchThe Fast and The Furious,Inch O'Brien's team uses their exceptional brainpower to solve the nation's crises, while also helping each other learn how to fit in.