Det. Steve McGarrett
Danny Williams
Chin Ho
Ben
Che Fong
Kono
Governor / The Governor
Duke / Police Dispatcher (uncredited)
Lori Wilson / Diana / Linda Forbes
Det. James 'Kimo' Carew
Jonathan Kaye / John Tarnow
Asst. Warden Geddison / Mr. Hodges
Horton's Girl / Liani
McClary / Dr. Baldwin
Suspect (uncredited) / Yuan Kee
Doc / Doc Bergman (uncredited)
Luana / Waitress
Yoko / Aku
Taki (uncredited) / Raymond
Lab Man / Charlie Ing
Dr. Stern / Chief Petty Officer
Frank / Jimmy Akana
Jonathan Kaye / General Dexter
The Knife / Simpson
