In the US TV series "The Mentalist", Patrick Jane's life is saved by which main enemy?
Correct answer: Red John

Kiwozzie
Loved this show, great plot lines, plus the fact that Simon Baker is an Aussie is a bonus!

Leapfoot
A really great series. Enjoyed immensely.

Tom
it is not everyday you can use the term archenemy.
But this describes Red John better than main enemy.
Very much Moriarty v Sherlock.