The Departed is a 2006 American crime drama film directed by Martin Scorsese, and a remake of the 2002 Hong Kong film Infernal Affairs. Irish Mob boss Francis "Frank" Costello (Jack Nicholson) plants Colin Sullivan (Matt Damon) as a mole within the Massachusetts State Police, while the police assign undercover state trooper William "Billy" Costigan (Leonardo DiCaprio) to infiltrate Costello's crew. ... more on Wikipedia