This movie is a classic and I constantly recommend it to people. A fantastically interesting crime movie following two detectives as they try to track and catch a serial killer. The quirk is that this killer chooses his victims based upon the seven deadly sins - Gluttony, Greed, Sloth, Lust, Pride, Envy, and Wrath.
Its difficult to describe why I love this movie. Its just so engaging and interesting, I've yet to meet anyone who isn't interested in watching it to its end. Indeed, whenever its on TV I feel compelled to watch it (despite having seen in dozens of times and owning the DVD). One of the absolute best in the "detectives track serial killer" genre (up there with Silence of the Lambs!). A real must-see with a killer ending (no, that's not a pun).