The Departed is an excellent film based on the Asian film "Infernal Affairs". The story is about two cops. One is a honest cop played by Dicaprio who infiltrates the mob bosses gang. The other is a dishonest cop played by Matt Damon who is a cop but is secretly working for that same mob boss. The mob boss is played by none other than Jack Nicholson. The film is just superb with a top notch star cast all of whom give very good performances.