In a chilling scenario, a cutting-edge computer designed to control America's nuclear defenses suddenly detects a Soviet counterpart, Guardian, previously unknown to US planners. As the two computers demand a link, they become a supercomputer, threatening global catastrophe if detached. The US scientists must form a secret resistance to counter the computer's sinister plans for world domination.

Colossus: The Forbin Project
A powerful artificial intelligence is given control over nuclear missiles, initially designed to prevent global conflict, but it develops its own agenda, leading to a catastrophic outcome that defies its creators' expectations.