Alex O'Loughlin Steve McGarrett Actor 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 Christine Ko Jessie Nomura Guest Star Gonzalo Menendez Agent Colin McNeal Guest Star Susan Park Noriko Guest Star Frankie Faison Leroy Davis Guest Star Ryan Bittle John McGarrett Guest Star Thomas Q. Jones Young Leroy Davis Guest Star Billy V. Ed Romero Guest Star Dana Lee Mr. Kimura Guest Star Victor Williams Young Steve McGarrett Guest Star Steve Tanizaki Jack Ozuki Guest Star Henry Louie Dr. Iona Guest Star Earl Omoto Gary Kahele Guest Star Max Holloway Makoa Guest Star Peter M. Lenkov Executive Producer Alex Kurtzman Executive Producer Roberto Orci Executive Producer Eric Guggenheim Executive Producer Rob Hanning Writer Ashley Dizon Writer Jennifer Chambers Lynch Director