Alex O'Loughlin Steve McGarrett Actor Scott Caan Danny "Danno" Williams Actor Ian Anthony Dale Adam Noshimuri Actor Meaghan Rath Tani Rey Actor Jorge Garcia Jerry Ortega Actor Beulah Koale Junior Reigns Actor Chi McBride Lou Grover Actor Katrina Law Quinn Liu Actor Taylor Wily Kamekona Actor Dennis Chun Sgt. Duke Lukela Actor Kimee Balmilero Dr. Noelani Cunha Actor Shawn Mokuahi Garnett Flippa Guest Star Lori Pelenise Tuisano Princess Guest Star Dan Amboyer Preston Guest Star Ellen Hollman Olivia Guest Star Kyle Leatherberry Darren Guest Star Kepa Kruse Caleb Guest Star Cassandra Hepburn Lana Guest Star Atticus Todd Lolo Joe Guest Star Marisol Ramirez Eileen Guest Star Damien Diaz Owen Guest Star Eric Scanlan Natano Guest Star David C. Farmer George Guest Star Frank Hunt Blaney Leo Guest Star Levy Aliifua Young Junior Guest Star Ty Elam Young Owen Guest Star Colleen Sayers Cousin Diane Guest Star Peter M. Lenkov Executive Producer Alex Kurtzman Executive Producer Roberto Orci Executive Producer Eric Guggenheim Executive Producer Paul Grellong Writer Noah Evslin Writer Ron Underwood Director