Great classic sci-fi flick that has flown under the radar for too long. This would make an awesome double-feature with The Andromeda Strain (1971). The story follows a brilliant inventor who creates a computer (Colossus) that can think and the U.S. government decides to put the computer in charge of all nuclear weapons (because it isn’t encumbered by human emotions). The Russians have another computer as well and the Russian and U.S. computers start talking together and decide to take over the world.
Colossus ends up becoming power hungry and puts all of mankind in jeopardy. He’s truly terrifying. He and HAL (from 2001) would get along great. The film plays to the Cold War fears of the era but as with all great science fiction, also has lots of things to say about the human condition along the way. The ending is especially powerful and thought-provoking.