John Carradine

Character: Dr. Rynning

Robert Dix

Character: Dr. Manning

Vicki Volante

Character: Valerie

Joey Benson

Character: Willy

Jennifer Bishop

Character: Lian Malian

Bruce Powers

Character: Cmdr. Steve Bryce

Fred Meyers

Character: Bob Scott

Britt Semand

Character: Linda

Al Adamson

Character: Earthly Vampire (uncredited)

John Andrews

Character: Man in Warehouse (uncredited)

John "Bud" Cardos

Character: Vampire Caveman (uncredited)

Theodore Gottlieb

Character: Opening Narrator (voice) (uncredited)

Gary Graver

Character: Earthly Vampire (uncredited)

Sean Graver

Character: Boy with Mother (uncredited)

Maria Lease

Character: Girl with Purse (uncredited)

Gus Peters

Character: Earthly Vampire (uncredited)

Irv Saunders

Character: Earthly Vampire (uncredited)