Terminator

The terminator is the villain in the 1984 film The Terminator. This specific model 101 was sent back through time by the super computer 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 resistance leader John Connor, before her son could be born.

Origins
The initial series of terminators, the 600, had rubber faces and were easy to spot. Their programming was to infiltrate and exterminate human settlements. In order to further this goal, Skynet replaced this series with the 800, which had living human tissue over a metal endoskeleton. The terminator was part of this series. When John Connor and the resistance smashed Skynet's defense grid, Skynet had this model 101 sent back through time using time displacement equipment. The resistance managed to send a human soldier, Kyle Reese, back through time to protect Sarah Connor.

Phone Book Killer
As most of the records were lost in the nuclear war, The terminator didn't know Sarah Connor's middle name, and looked her up in the phone book. there were three Sarah Connors living in Los Angeles, and the terminator went down the list alphabetically. Luckily for the future, the Sarah Connor was the last on the list. this method led the police to investigate the "phone book killer," as the press called it. The terminator and Reese both caught up with Sarah Connor in a night club, where Sarah had called the police when she noticed Reese following her. Reese and Sarah escaped and hid in a parking garage, where he explained everything that had happened in the future and his purpose to her.