A slick, soulful retelling of Hong Kong actioner ‘Internal Affairs’. A Boston police mole goes undercover in a gang, while the gangsters' get their man to infiltrate the police force. “Nicholson plays a psychopathic gang boss, Scorsese directs, Damon and DiCaprio co-star. The result is electrifying” – The Guardian. Starring Jack Nicholson, Leonardo DiCaprio, Matt Damon. Directed by Martin Scorsese.