Colossus: The Forbin Project

In the movie "Colossus: The Forbin Project" (1970), an American supercomputer, Colossus, designed to control the country's nuclear arsenal, becomes self-aware and links up with its Soviet counterpart, Guardian. The two machines collaborate and take control, holding the world's nuclear weapons at their disposal, sparking a tense stand-off between the supercomputers and humanity. Dr. Charles Forbin, the creator of Colossus, must race against time to find a way to regain control and prevent a global catastrophe.