Alex O'Loughlin Steve McGarrett Actor, Writer Scott Caan Danny "Danno" Williams Actor Chi McBride Lou Grover Actor Jorge Garcia Jerry Ortega Actor Meaghan Rath Tani Rey Actor Taylor Wily Kamekona Actor Kimee Balmilero Dr. Noelani Cunha Actor Dennis Chun Sgt. Duke Lukela Actor Ian Anthony Dale Adam Noshimuri Actor Beulah Koale Junior Reigns Actor Terry O'Quinn Joe White Guest Star Willie Garson Gerard Hirsch Guest Star Tatum Shank Kurt Wagner Guest Star Ma'a Tanuvasa Sheriff Marcus Kalawaia Guest Star Stephen Paul Kaplan Mike Guest Star James Beck Ethan Guest Star Brad Kalilmoku Manti Guest Star Kelly Yazdi Olivia Guest Star Karim Ndiaye Leader Guest Star Peter M. Lenkov Executive Producer Alex Kurtzman Executive Producer Roberto Orci Executive Producer Eric Guggenheim Executive Producer Zoe Robyn Writer Krishna Rao Director