Horror of the Blood Monsters

John Carradine

Dr. Rynning

Robert Dix

Dr. Manning

Vicki Volante

Valerie

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Joey Benson

Willy

Jennifer Bishop

Lian Malian

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Bruce Powers

Cmdr. Steve Bryce

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Fred Meyers

Bob Scott

Britt Semand

Linda

Al Adamson

Earthly Vampire (uncredited)

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John Andrews

Man in Warehouse (uncredited)

John "Bud" Cardos

Vampire Caveman (uncredited)

Theodore Gottlieb

Opening Narrator (voice) (uncredited)