Boyd Langton, Dollhouse
Like Ezra, Boyd was a long standing good character on Joss Whedon's two season sci-fi dystopian drama Dollhouse — that is, before he was revealed to be on the side of evil in the last few episodes. He was protagonist Echo's "handler" — basically her monitor and guard. Yes, he was part of the Dollhouse's creepy system of brainwashing people and loading them with fake personalities, but he seemed to dislike his job because of its exploitative nature, and really did care about Echo and her well being. So imagine our shock when we learned that he was actually the head of the evil Rossum Corporation, AKA the mastermind behind everything.