Overview
To take down South Boston's Irish Mafia, the police send in one of their own to infiltrate the underworld, not realizing the syndicate has done likewise. While an undercover cop curries favor with the mob kingpin, a career criminal rises through the police ranks. But both sides soon discover there's a mole among them.
Cast
- Leonardo DiCaprio as Billy
- Matt Damon as Colin
- Jack Nicholson as Costello
- Mark Wahlberg as Dignam
- Martin Sheen as Queenan
- Ray Winstone as Mr. French
- Vera Farmiga as Madolyn
- Anthony Anderson as Brown
- Alec Baldwin as Ellerby
- Kevin Corrigan as Cousin Sean