The mysterious John Doe gives quite the headache to Brad Pitt and Morgan Freeman in the David Fincher serial killer flick 'Se7en.' Portrayed with a chilling calm by Kevin Spacey, Doe horrifically murders people in the style of the seven deadly sins, but surprisingly [SPOILER] turns himself in during the film's climax. He gives a skin-crawling speech about motive and how he feels about people before unveiling his final -- and meanest -- tableau involving Pitt's character, his wife and a rather unfortunate special delivery.