1970s apocalyptic sci-fi. When Dr. Charles Forbin (Eric Braeden) creates a supercomputer capable of controlling America's nuclear defences, it detects the presence of its previously unknown Russian equivalent, & insists on being linked to it. But when the two machines are switched on, they immediately take control, merging into one supercomputer by the name of Colossus, issuing its own demands for the earth's management, & ruthlessly putting down any signs of dissent. With Colossus gaining more power daily, & threatening world destruction if its demands are not met, Forbin secretly enlists the help of other scientists to form a resistance group aimed at restoring normality.