Really unexpected ending

Rating: 9/10 (25 August 2014)

Nice film however the ending was really really unacceptable as Billy was immediately shot in the head when the elevator door opens, which led to several really really surprising killings. Nearly all main characters were dead.
The Departed does reflect quite a few interesting problem in society, such as Costello has something to do with FBI or more than one under-covers at among polices.
One thing is different with the original work is that in the book there were two main female characters while in the film there is only one, Madolyn. I can't accept that she slept with both Billy and Sullivan.
Don't trust anyone, is something the film is trying to convey. You'll never know who is on your side. Some people were just pretending to be loyal, while some are righteous although they seem rude.