
"From out of space...A warning and an ultimatum."
An alien and a robot land on Earth after World War II and tell mankind to be peaceful or face destruction.
Klaatu, alias Mr. Carpenter

Helen Benson

Bobby Benson

Prof. Jacob Barnhardt

Tom Stevens

Gort

General Cutler

Mrs. Crockett, landlady

Mr. Harley, Secretary to the President

Mrs. Barley, boarder

George Barley, boarder

Mr. Krull, boarder

Hilda, Barnhart's secretary
Elmer Davis
H. V. Kaltenborn
Drew Pearson
Gabriel Heatter (voice)
Lieutenant in Charge of Landing Site

Army Dr. White
Balding Army Doctor
Army Examining Doctor

Radio Interviewer at Landing Site
Brady

M.P. Captain at Barnhardt's

Conference Colonel Ryder

Margaret, Tom's secretary

Mr. Bleeker, jeweller

Zone Five Lieutenant Colonel

The Cab Driver

Sammy, boy witness

Lady Outside Jewelry Store

Government Man

Radar Operator
Indian Newscaster
British Newscaster
Sentry (scene deleted)

Scientific Delegate
British Radio Announcer
Radio Announcer (voice)