Martin Scorsese's superb remake of the Hong Kong crime thriller "Infernal Affairs" tracks the deadly cat-and-mouse game between rookie state cop Billy Costigan (Leonardo DiCaprio), who's assigned to infiltrate South Boston mob boss Frank Costello's (Jack Nicholson) operation, and corrupt Internal Investigations officer Colin Sullivan (Matt Damon), trying to learn the informant's identity. Winner of four Academy Awards, including Best Picture and Best Director; Mark Wahlberg, Martin Sheen, Alec Baldwin co-star. 151 min. Widescreen; Soundtrack: English.