

"The terrifying truth about flying saucers!"
Test space rockets exploding at liftoff and increased reporting of UFO sightings culminate in a direct attempt by alien survivors of a dead, extra-galactic civilization to invade Earth from impervious flying saucers, using ray-weapons of mass destruction.
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)

Military Official (uncredited)
Minor Role (uncredited)
Military Official (uncredited)
Sgt. Nash (uncredited)

Cutting - Generator Technician (uncredited)

Minor Role (uncredited)
Worker in Control Tower (uncredited)
Plane Passenger (uncredited)

Military Officer at Experiment (uncredited)

Radio Listener (archive footage) (uncredited)
Plane Passenger (uncredited)
Tank Commander (uncredited)

Maj. Kimberly (uncredited)
Man Crushed Beneath Wall (uncredited)

Civilian Observing Saucer Attack (uncredited)
Plane Passenger (uncredited)
Alfred Cassidy (uncredited)

Chinese Radio Listener (uncredited)
Narrator (voice) (uncredited)
