Diretor/a
Fred F. Sears
DIRETOR/A
Elenco (na ordem dos créditos)
Hugh Marlowe
Dr. Russell A. Marvin
Joan Taylor
Carol Marvin
Donald Curtis
Maj. Huglin
Morris Ankrum
Maj. Gen. John Hanley
John Zaremba
Prof. Kanter
Thomas Browne Henry
Vice Adm. Enright
Grandon Rhodes
Gen. Edmunds
Larry J. Blake
Motorcycle Cop
Fred Aldrich
Airplane Passenger(uncredited)
Nicky Blair
Military Officer at Experiment(uncredited)
Jimmy Cross
Military Messenger(uncredited)
Jack Deery
Military Officer(uncredited)
Charles Evans
Dr. Alberts(uncredited)
Raoul Freeman
Military Official(uncredited)
Paul Frees
Alien(uncredited)(voice)
James Gonzalez
Duke Green
Minor Role(uncredited)
Ed Haskett
Clark Howat
Sgt. Nash(uncredited)
Harry Lauter
Cutting - Generator Technician(uncredited)
Don Marlowe
William Meader
Worker in Control Tower(uncredited)
Sol Murgi
Plane Passenger(uncredited)
Forbes Murray
William J. O'Brien
Radio Listener(uncredited)(archiveFootage)
Murray Pollack
Mike Ragan
Tank Commander(uncredited)
Alan Reynolds
Maj. Kimberly(uncredited)
Bert Stevens
Air Intelligence Command Officer(uncredited)
Arthur Tovey
Officer(uncredited)
Dale Van Sickel
Man Crushed Beneath Wall(uncredited)
Guy Way
Civilian Observing Saucer Attack(uncredited)
Bob Whitney
Frank Wilcox
Alfred Cassidy(uncredited)
Beal Wong
Chinese Radio Listener(uncredited)
William Woodson
Narrator(uncredited)(voice)