Irish Mob boss Frank Costello (Nicholson) plants Colin Sullivan (Damon) as a mole within the Massachusetts State Police; simultaneously, the police assign undercover state trooper Billy Costigan (DiCaprio) to infiltrate Costello's crew.
Irish Mob boss Frank Costello (Nicholson) plants Colin Sullivan (Damon) as a mole within the Massachusetts State Police; simultaneously, the police assign undercover state trooper [M]Billy Costigan (DiCaprio[/M]) to infiltrate Costello's crew.[SEP]Irish Mob boss Frank Costello (Nicholson) plants Colin Sullivan (Damon) as a mole within the Massachusetts State Police; simultaneously, the police assign [M]undercover state trooper Billy Costigan[/M] (DiCaprio) to infiltrate Costello's crew.[SEP]Irish Mob boss Frank Costello (Nicholson) plants Colin Sullivan (Damon) as a mole within the Massachusetts State Police; [M]simultaneously, the police assign[/M] undercover state trooper [M]Billy Costigan[/M] (DiCaprio) [M]to infiltrate Costello's crew.[/M][SEP]Irish Mob boss Frank Costello (Nicholson) plants [M]Colin Sullivan (Damon[/M]) as a mole within the Massachusetts State Police; simultaneously, the police assign undercover state trooper Billy Costigan (DiCaprio) to infiltrate Costello's crew.[SEP]Irish Mob boss [M]Frank Costello[/M] (Nicholson) [M]plants Colin Sullivan[/M] (Damon) [M]as a mole within the Massachusetts State Police[/M]; simultaneously, the police assign undercover state trooper Billy Costigan (DiCaprio) to infiltrate Costello's crew.[SEP]Irish Mob boss [M]Frank Costello (Nicholson[/M]) plants Colin Sullivan (Damon) as a mole within the Massachusetts State Police; simultaneously, the police assign undercover state trooper Billy Costigan (DiCaprio) to infiltrate Costello's crew.[SEP][M]Irish Mob boss Frank Costello[/M] (Nicholson) plants Colin Sullivan (Damon) as a mole within the Massachusetts State Police; simultaneously, the police assign undercover state trooper Billy Costigan (DiCaprio) to infiltrate Costello's crew.