10 Movies That Had TWO Incredible Villains

The original Saw executed such a stunning and unexpected villain reveal - that the Jigsaw Killer was a cancer patient, John Kramer (Tobin Bell), hidden in plain sight - that the sequel had to pull out all the stops to have a chance of living up to it.

For the majority of the movie it appears that Kramer is again working alone, no matter how implausible it might seem that a man increasingly ravaged by terminal cancer could set such a complex "game" up.

But at the end of Saw II, it's revealed that Kramer had a secret apprentice helping him run the game all along: Amanda Young (Shawnee Smith), the drug addict who Kramer tested in the original movie.

Amanda appears to be trapped in Jigsaw's new game throughout the film, though at the end it's revealed that she's been working with Jigsaw ever since she survived her original game, all with the intention of carrying on Kramer's legacy after he dies.

Basically, she was put in Saw II's central game as a ringer to keep nudging the test subjects in the right direction.

It was a fun reveal that worked because the audience simply wasn't suspicious of Amanda at all, and though the "secret apprentice" twist was wildly overused in the later sequels, here it felt totally fresh.