The Day the Earth Stood Still
The Day the Earth Stood Still (a.k.a. Farewell to the Master and Journey to the World) is a 1951 American black-and-white science fiction film from 20th Century Fox, produced by Julian Blaustein, directed by Robert Wise, that stars Michael Rennie, Patricia Neal, Billy Gray, Hugh Marlowe, and Sam Jaffe. The screenplay was written by Edmund H. North, based on the 1940 science fiction short story "Farewell to the Master" by Harry Bates.
In The Day the Earth Stood Still, a humanoid alien visitor named Klaatu comes to Earth, accompanied by a powerful eight-foot-tall robot, Gort, to deliver an important message that will affect the entire human race.
An alien (Klaatu) with his mighty robot (Gort) land their spacecraft on Cold War-era Earth just after the end of World War II. They bring an important message to the planet that Klaatu wishes to tell to representatives of all nations. However, communication turns out to be difficult, so, after learning something about the natives, Klaatu decides on an alternative approach. [Bruce Janson]