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Dr. Russell A. Marvin
Carol Marvin
Maj. Huglin
Brig. Gen. John Hanley
Vice Adm. Enright
Gen. Edmunds
Prof. Kanter
Alien (voice)
Alfred Cassidy
Frank the garage man
Motorcycle cop
Air Intelligence Command Officer
Military Officer at Experiment
Officer/Civilian at Military Conference
Major Kimberly
Military Officer at Experiment (uncredited)
Military Messenger (uncredited)
Military Officer (uncredited)
Dr. Alberts (uncredited)
Military Official (uncredited)
Alien (voice) (uncredited)
Minor Role (uncredited)
Sgt. Nash (uncredited)
Cutting - Generator Technician (uncredited)
Worker in Control Tower (uncredited)
Plane Passenger (uncredited)
Radio Listener (archive footage) (uncredited)
Tank Commander (uncredited)
Maj. Kimberly (uncredited)
Man Crushed Beneath Wall (uncredited)
Civilian Observing Saucer Attack (uncredited)
Alfred Cassidy (uncredited)
Chinese Radio Listener (uncredited)
Narrator (voice) (uncredited)
Art Direction
Set Decoration
Director of Photography
Special Effects
Assistant Director
Director
Editor
Executive Producer
Producer
Production Coordinator
Unit Manager
Sound
Visual Effects
Novel
Screenplay
Screenstory
