There are dark movies. Then there are really dark movies. And then there's a really, really dark movie like David Fincher's Seven. It's the kind of film that begins with a series of heinous, incredibly graphic murders, and only gets darker from there. Brad Pitt plays a cop in a bleak, perpetually-rainy city that seems just a shade nicer than hell. We won't ruin the famous ending, but let's just say it involves a damp cardboard box and a very unhappy Brad Pitt.