Michael Emerson (
Lost,
Person of Interest) eating up the scenery as a serial killer who cons everyone into believing he's just a harmless fantasist, gets off and then starts stalking his lawyer in season 5 of
The Practice. He won a guest actor Emmy, which is unsurprising given he's so memorable I still instantly recognised him four years later when he popped up in
Saw. He walks this fine line between archly camp and deeply creepy.
