John Carradine
Dr. Rynning
Robert Dix
Dr. Manning
Vicki Volante
Valerie
Joey Benson
Willy
Jennifer Bishop
Lian Malian
Bruce Powers
Cmdr. Steve Bryce
Fred Meyers
Bob Scott
Britt Semand
Linda
Al Adamson
Earthly Vampire (uncredited)
John "Bud" Cardos
Vampire Caveman (uncredited)
Theodore Gottlieb
Opening Narrator (voice) (uncredited)
Sean Graver
Boy with Mother (uncredited)
Gus Peters
Earthly Vampire (uncredited)
Irv Saunders
Earthly Vampire (uncredited)