"The Departed" is a 2006 crime thriller directed by Martin Scorsese. The film is a remake of the Hong Kong movie Infernal Affairs and follows an undercover cop, Billy Costigan, who infiltrates a criminal organization led by Frank Costello. At the same time, a mole within the police department, Colin Sullivan, works for Costello, creating a tense cat-and-mouse game. Set in Boston, the film explores themes of loyalty, betrayal, and identity. It features a star-studded cast, including Leonardo DiCaprio, Matt Damon, and Jack Nicholson. "The Departed" received critical acclaim and won four Academy Awards, including Best Picture.