John Carradine
Dr. Charles Conway
John Carradine
Dr. Charles Conway
Myron Healey
Mark Houston
Allison Hayes
Grace Thomas
Marilyn Buferd
Dr. Sharon Gilchrist
Tor Johnson
Lobo
Arthur Batanides
Danny Green
Sally Todd
Natalie Andries
Harry Fleer
Harry Jedrow
Roy Gordon
Dr. Loren Wright
Guy Prescott
Police Captain George Reagan
Raymond Guth
Police Officer Miller
Paul McWilliams
Police Officer Ed
Gloria Petroff
Screaming Woman
Karl Johnson
Monster in Basement (uncredited)
Harry Wilson
Monster in Basement (uncredited)
Boris Petroff
Director
John D.F. Black
Screenplay
Jane Mann
Screenplay
Betty Sinclair
Production Manager
Robert A. Terry
Associate Producer
Jane Mann
Original Story
W. Merle Connell
Director of Photography
Henry Vars
Original Music Composer
Boris Petroff
Producer
Daniel Hall
Art Direction
Mowbray Berkeley
Set Decoration
Harry Thomas
Makeup Designer