The Day the Earth Stood Still

The Day the Earth Stood Still  is a 1951 American black-and-white science fiction film from 20th Century Fox, produced by Julian Blaustein, directed by Robert Wise, and starring Michael Rennie, Patricia Neal, Hugh Marlowe, and Sam Jaffe.  The notable score was composed by Bernard Herrmann.  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.   (More from Wikipedia)