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)