






Starship C57D travels to planet Altair 4 in search of the crew of spaceship "Bellerophon," a scientific expedition that has been missing for twenty years. They find themselves unwelcome by the expedition's lone survivor and warned of destruction by an invisible force if they don't turn back immediately.
Production
MGM spent $125K on sets — most expensive sci-fi yet
Practical Effects
Robby the Robot: cinema's first iconic mechanical star
Sound
First all-electronic film score — beeps become terror

Director
Fred M. Wilcox
Trivia, insights & behind the scenes