I saw "The Departed" tonight...
If you want to save ten bucks and two and a half hours of your life, read on... (SPOILERS)
There are two men: One is a cop who is undercover in the mob, the other is a mob guy undercover in the police force. They spend the entire movie lying to everybody and by the end of the movie they are both dead, along with just about everybody else. And everyone gets shot in the head with big splatter and blowback. The End.
It is a terrific movie to see if you are feeling the slightest bit depressed...and yes, that is sarcasm.