Horror of the Blood Monsters

John Carradine

Dr. Rynning

Robert Dix

Dr. Manning

Vicki Volante

Valerie

Jennifer Bishop

Lian Malian

Bruce Powers

Cmdr. Steve Bryce

Al Adamson

Earthly Vampire (uncredited)

John Andrews

Man in Warehouse (uncredited)

John 'Bud' Cardos

Vampire Caveman (uncredited)

Brother Theodore

Opening Narrator (voice) (uncredited)

Gary Graver

Earthly Vampire (uncredited)

Sean Graver

Boy with Mother (uncredited)

Gus Peters

Earthly Vampire (uncredited)

Al Adamson

Al Adamson