Horror of the Blood Monsters

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 Andrews

Man in Warehouse (uncredited)

John "Bud" Cardos

Vampire Caveman (uncredited)

Theodore Gottlieb

Opening Narrator (voice) (uncredited)