10 Movie Villains Who Became Heroes In The Sequel

James Cameron's The Terminator introduced one of the most tenaciously terrifying villains in cinema history with the seemingly unstoppable cyborg juggernaut that was the T-800 (Arnold Schwarzenegger).

But for the sequel, Cameron came up with a novel twist - what if he brought the T-800 back, not as a killing machine intent on murdering mother-to-the-resistance Sarah Connor (Linda Hamilton), but rather tasked with protecting her son John (Edward Furlong) from another killer cyborg sent back through time?

Now, this is admittedly a mild cheat in the sense that this isn't the very same T-800 which pursued Sarah in the original movie - it having been crushed in a hydraulic press and all - but for all intents and purposes, T2 does nevertheless bring the original villain back and switch its allegiance.

The Terminator sent from the future to protect John is another T-800 machine captured by the human resistance and reprogrammed to protect him. 

This proved quite the shock to those lucky enough to catch T2 in cinemas without knowing this "twist" beforehand, and today it remains arguably the greatest instance of a "character" swapping sides in the sequel.