Diretor/a
Ib Melchior
DIRETOR/A
Elenco (na ordem dos créditos)
Gerald Mohr
Col. Thomas O'Bannion
Nora Hayden
Dr. Iris 'Irish' Ryan
Les Tremayne
Prof. Theodore Gettell
Jack Kruschen
CWO Sam Jacobs
Paul Hahn
Maj. Gen. George Treegar
J. Edward McKinley
Prof. Paul Weiner
Tom Daly
Dr. Frank Gordon
Don Lamond
TV Newscaster(voice)
Edward Innes
Brig. Gen. Alan Prescott
Gordon Barnes
Maj. Lyman Ross
Jack Haddock
Lt. Col. Davis
Brandy Bryan
Nurse Hayes
Joan Patrick
Nurse Dixon
Duke Norton
Dr. Muller
William Remick
Dr. Hawley
Fred Ross
Air Force News Photographer
David De Haven
Arline Hunter
Joan
Alean 'Bambi' Hamilton
Joan's Friend
Richard Baxter
1st Monitor(uncredited)
Ralph Brooks
Security Man at Briefing(uncredited)
Ted Cassidy
Martian(uncredited)(voice)
Billy Curtis
Martian(uncredited)
Alan Prescott
Brigadier General(uncredited)
Billy Snyder
(uncredited)