Mark Bradley
Jeff Richards
Joe Walker
John Smith
Pilot (uncredited)
Bob Stratton
Venus
Venetia Stevenson
Dr. Paul Lujan
Alan Napier
Urana
Diane Jergens
Mercuria
June Blair
Dr. McBain
Gavin Muir
M. Hugh Garland
George Brand
Co-Pilot (uncredited)
Vern Taylor
Tom Riley
Director
Frank Tuttle
Director of Photography
John F. Seitz
Producer
Albert J. Cohen
Writer
Ray Buffum
Original Music Composer
Raoul Kraushaar
Story
Prescott Chaplin
Associate Producer
George C. Bertholon
Costume Design
Howard Shoup
Makeup Supervisor
Gordon Bau
Editor
Roland Gross
Art Direction
Jack T. Collis
Set Decoration
Frank M. Miller