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)

Gary Graver

Earthly Vampire (uncredited)

?

Sean Graver

Boy with Mother (uncredited)

Maria Lease

Girl with Purse (uncredited)