James Cameron's 1991 action spectacular "Terminator 2: Judgment Day" felt, at the time, like the biggest movie imaginable. Cameron upgraded his low-budget 1984 original into one of the slickest, most visually innovative action movies made to date, featuring a robotic villain that could transform into a living blob of shape-shifting mercury-like metal. The villainous robot, the T-1000 (Robert Patrick), travels back in time from the future to kill the adolescent John Connor (Edward Furlong), destined to lead a resistance force against an army of machines. Yes, the future in Cameron's movies is bleak; robots will soon achieve consciousness and, almost instantly, detonate a nuclear bomb.

Luckily, John has his mentally unbalanced mother Sarah (Linda Hamilton) to look after him, as well as a "good" time-traveling Terminator robot (Arnold Schwarzenegger) reprogrammed to protect him. By the end of the film, it seems that the characters were able to close off several causality...