An alien and a robot land on Earth after World War II and tell mankind to be peaceful or face destruction.
Michael Rennie
Klaatu, alias Mr. Carpenter
Patricia Neal
Helen Benson
Billy Gray
Bobby Benson
Sam Jaffe
Prof. Jacob Barnhardt
Hugh Marlowe
Tom Stevens
Lock Martin
Gort
Freeman Lusk
General Cutler
Edith Evanson
Mrs. Crockett, landlady
