Terminator 2: Judgment Day
When John learns that the T-1000 will copy Sarah and then kill her, he and the Terminator go to rescue her. Sarah is very afraid by it, but after seeing it fight off the T-1000, she accepts that they need its help. As they escape the city, the Terminator tells her about the future of Skynet, the supercomputer that will get rid of humans. He tells her about its maker, Miles Bennet Dyson (Joe Morton), who makes a learning computer that suddenly becomes self-aware on August 4, 1997. It begins learning very quickly, and on August 29, 1997, it launches nuclear missiles that kills most humans.