The Day the Earth Stood Still (1951)
Written by Edmund H North, based on a novel by Harry Bates
Directed by Robert Wise
Starring Michael Rennie, Patricia Neal, Billy Gray, Sam Stephens
A sharp, intelligent sci-fi thriller with a message of warning to the people of Earth to stop being dicks. Or rather, you can be dicks all you want, but if you spread it out beyond your own borders, you’re going to get smacked hard. This is, quite literally, one of the greatest films ever made. It has been acknowledged by the American Film Institute as the fifth best sci-fi film ever; it repeatedly gets included in Top 100 lists (sci-fi or otherwise); it holds a 94% rating from Rotten Tomatoes; it received a special Golden Glove Award for “promoting international understanding.” And it was cited by Arthur C Clarke as one of the greatest sci-fi films of all time — higher than his own film, 2001: A Space Odyssey.