The simple premise: A killer android (played by Arnold Schwarzenegger) is sent back to 1984 to assassinate the mother (Linda Hamilton) of a resistance leader of the future. A soldier of that resistance (Michael Biehn) is also sent back to protect her from harm, but the killer android is virtually unstoppable in its mission. This classic science fiction/action/horror/thriller represents the best in all of those genres that the 1980s has to offer.  James Cameron put his name on the map with this action masterpiece.