In 2003, Dr. Serena Kogan of Cyberdyne Systems convinces death row inmate Marcus Wright to sign over his body for medical research following his execution. Terminator 3: Rise of the Machines, the automated Skynet (Terminator) system is activated and becomes self-aware; perceiving humans as a threat to its existence, it starts a nuclear holocaust to eradicate them in the event known as "Judgment Day".
In the 21st century, a weapon will be invented like no other. This weapon will be powerful, versatile and indestructible. It can't be reasoned with. It can't be bargained with. It will feel no pity. No remorse. No pain. No fear. It will have only one purpose: to return to the present and prevent the future. This weapon will be called...The Terminator.