Col. Thomas O`Bannion
Gerald Mohr
Dr. Iris Ryan
Naura Hayden
Lt. Col. Davis
Jack Haddock
Nurse Hayes
Brandy Bryan
Nurse Dixon
Joan Fitzpatrick
Dr. Muller
Duke Norton
Dr. Hawley
William Remick
Air Force News Photographer
David De Haven
Joan
Arline Hunter
Joan's Friend
Alean 'Bambi' Hamilton
Fred Ross
Prof. Theodore Gettell
Les Tremayne
CWO Sam Jacobs
Jack Kruschen
Maj. Gen. George Treeger
Paul Hahn
Prof. Paul Weiner
J. Edward McKinley
Dr. Frank Gordon
Tom Daly
TV Newscaster / Narrator / Martian (voice)
Don Lamond
Brig. Gen. Alan Prescott
Edward Innes
Maj. Lyman Ross
Gordon Barnes
Director
Ib Melchior
Screenplay
Makeup Artist
David Newell
Director of Photography
Stanley Cortez
Sidney W. Pink
Producer
Norman Maurer
Original Music Composer
Paul Dunlap
Story
Editor
Ivan J. Hoffman
Associate Producer
Lou Perlof
Production Design
Script Supervisor
Hazel W. Hall
Camera Operator
Robert Johannes
Still Photographer
Roger Mace
Special Effects
Herman E. Townsley
Sound Mixer
Victor B. Appel
Property Master
Mel Sternlight
Arthur Wasson
Hairstylist
Lillian Shore
Assistant Camera
Bert Eason