Cast 15
Judd Holdren
Rex Barrow
Vivian Mason
Ella Dorn
Michael Fox
Dr. Ernst Grood
Forrest Taylor
Prof. Edmund Dorn
Gene Roth
Reckov
Ted Thorpe
Tim Johnson
Karl 'Killer' Davis
Karlo
Jack George
Jarva
Frederic Berest
Alden
John Cason
Hopper
Lee Roberts
Wesley Brenn
Nick Stuart
Darl
Joseph Mell
Lah
Pierre Watkin
Ned Hilton
Leonard Penn
Ken Wopler
Crew 8
Spencer Gordon Bennet
Director
George H. Plympton
Screenplay
Arthur Hoerl
Screenplay
Sam Katzman
Producer
Earl Turner
Editor
Jack Erickson
Special Effects
Howard Swift
Animation
William P. Whitley
Director of Photography