Alex O'Loughlin Steve McGarrett Actor Scott Caan Danny "Danno" Williams Actor Daniel Dae Kim Actor Grace Park Actor Jean Smart Guest Star Will Yun Lee Guest Star Norman Reedus Guest Star James Marsters Guest Star William Sadler Guest Star Allison Chu Guest Star Patrick Crowley Guest Star Teilor Grubbs Guest Star Lexi Hara Guest Star Meagen Hensley Guest Star David Bintliff Johnson Jr. Guest Star Blaine Kia Guest Star Thomas McCurdy Guest Star Kelemete Misipeka Guest Star Brendon Pave Guest Star Jonathan Clarke Sypert Guest Star Taylor Wily Kamekona Guest Star Sonya Seng Guest Star Alex Kurtzman Executive Producer, Writer Roberto Orci Executive Producer, Writer Peter M. Lenkov Writer Len Wiseman Director