The granddaddy of all "computer run amok" films, Colossus: The Forbin Project concerns a huge electronic brain designed to control the American missile defense system. Colossus' technicians do not count on the computer developing an intelligence of its own. Communicating with its Russian counterpart, Colossus decides to take over the earth, threatening global destruction should anyone try to pull its plug. The film's climax is unsettling, but no more so than the actual state of world affairs in 1970. Colossus: The Forbin Project was filmed in Canada.
by Hal Erickson synopsis