Det. Steve McGarrett
Danny Williams
Chin Ho
Ben
Che Fong
Kono
Governor / The Governor
Duke / Duke Lukela
Lori Wilson / Mary Beth Rogers
Det. James 'Kimo' Carew
Jonathan Kaye / Dr. Ventnor
Dr. Spear / Dr. Bromley
Horton's Girl / Celeste Caro
McClary / Dr. Morrison
Yoshigo / Dr. Kubota
Doc / Doc Bergman (uncredited)
Luana / Waitress
Rafael Orduno / Yoko
John Manoa / Dr. Carruthers
Che Fong / Lab Man
Burt Davis / Dr. Stern
Frank / Chief Kaana
Jonathan Kaye / Dr. Sartain
Man #2 / Simpson
