The Departed (2006)

To take down South Boston's Irish Mafia, the police send in one of their own to infiltrate the underworld, not realizing the syndicate has done likewise. While an undercover cop curries favor with the mob kingpin, a career criminal rises through the police ranks. But both sides soon discover there's a mole among them.

• Rating: 8.2/10 (15598 votes)
• Released: October 2006
• More Information: (IMDB) (TMDb)

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It is also all a bit beta still, Sory about that.