The discovery of a perfectly preserved caveman prompts a mad scientist to attempt a daring brain transplant.

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Main Cast: Bela Lugosi, John Carradine, Frank Moran, Teala Loring, Tod Andrews, Mary Currier, Ernie Adams, Eddy Chandler, George Zucco, Mike Donovan

Director: Phil Rosen

Writer: Robert Charles

Editor: Carl Pierson

Cinematographer: Marcel Le Picard

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