Martin Scorsese directs this mob-themed crime thriller, a remake of the 2002 Hong Kong film Infernal Affairs. Set in Boston, Massachusetts, the story centers on two men, a corrupt cop (played by Matt Damon) and an informant (played by Leonardo DiCaprio), both of whom are pretending to be the opposite of what they really are. When both sides realize the situation, each man attempts to discover the other's true identity before his own cover is blown. Also starring Jack Nicholson, Mark Wahlberg, Martin Sheen, Ray Winstone, Vera Farmiga, Anthony Anderson & Alec Baldwin.