The Day the Earth Stood Still (1951) plot summary
An alien named Klaatu (Michael Rennie) with his mighty robot, Gort, land their spacecraft on Earth just after the end of World War II. They bring an important message for the planet which Klaatu wishes to tell to representatives of all nations. However, communication turns out to be difficult so, after learning something of the natives, Klaatu decides on an alternative approach.
