Alex O'Loughlin Steve McGarrett Actor Scott Caan Danny "Danno" Williams Actor Daniel Dae Kim Chin Ho Kelly Actor Grace Park Kono Kalakaua Actor Masi Oka Dr. Max Bergman Actor Michelle Borth Catherine Rollins Actor Taylor Wily Kamekona Guest Star Brian Yang Guest Star Todd Stashwick Guest Star Michael McGrady Guest Star Cynthia Watros Guest Star Julie McNiven Guest Star Ekahi Lee Guest Star Peter M. Lenkov Executive Producer Alex Kurtzman Executive Producer Roberto Orci Executive Producer Elwood Reid Writer Steve Boyum Director