The Terminator (also known as The T-800) is the titular main antagonist of the 1984 live action film of the same name. This specific model 101 was a design made by Dr. Serena Kogan and sent back through time by the supercomputer, Skynet, which had touched off nuclear war and took over the world in its aftermath. Its mission was to kill Sarah Connor, the mother of the resistance leader named John Connor, before her son could be born. He is also the alternate version of the good Terminator.
In the original film, he was portrayed by Arnold Schwarzenegger who also played the hero in the second film and the Universal Studios series.