An undercover cop and a mole in the police attempt to identify each other while infiltrating an Irish gang in South Boston.
- Runtime: 151 min
- Released: 06 Oct 2006
- Genre:Crime, Drama, Thriller
- Starring: Leonardo DiCaprio, Matt Damon, Jack Nicholson
- Writer: William Monahan, Alan Mak, Felix Chong
- Director: Martin Scorsese
- Available countries: United States, Hong Kong