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