Casts:
Mark RolstonLeonardo DiCaprioMark WahlbergMartin SheenMatt DamonAlec BaldwinAnthony AndersonVera FarmigaJames Badge DaleMartin ScorseseJack NicholsonRay WinstoneKevin CorriganDavid O'HaraRobert WahlbergKristen Dalton
An undercover cop and a mole in the police attempt to identify each other while infiltrating an Irish gang in South Boston.