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"Cops or criminals. When you’re facing a loaded gun, what’s the difference?"
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.
102 Cast Members
Leonardo DiCaprio
Billy
Matt Damon
Colin
Jack Nicholson
Costello
Mark Wahlberg
Dignam
Martin Sheen
Queenan
Ray Winstone
Mr. French
Vera Farmiga
Madolyn
Anthony Anderson
Brown
Alec Baldwin
Ellerby
Kevin Corrigan
Cousin Sean
James Badge Dale
Barrigan
David O'Hara
Fitzy
Mark Rolston
Delahunt
Robert Wahlberg
Lazio (FBI)
Kristen Dalton
Gwen
Thomas B. Duffy
Govenor
Richard Hughes
Uncle Edward
J.C. MacKenzie
Realtor
Mary Klug
Billy's Aunt
Peg Holzemer
Mrs. Kennefick
