Aliens have landed and are hiding on Earth, but need Earth’s scientists to help them fight an inter-planetary war.
Dr. Cal Meacham
Dr. Ruth Adams
Exeter
Brack
Joe Wilson
Steve Carlson
The Monitor of Metaluna
Dr. Adolph Engelborg
Mutant (uncredited)
Pilot (uncredited)
Express Deliveryman (uncredited)
Webb (uncredited)
Metaluna Woman at Decompression Console (uncredited)
Dr. Hu Ling Tang (uncredited)
Dr. Marie Pitchner (uncredited)
