The original Hong Kong crime thriller 'Infernal Affairs', which inspired 'The Departed', is released.
Famed director Martin Scorsese announces plans to remake the Hong Kong film 'Infernal Affairs' for American audiences.
Principal photography for 'The Departed' starts in Boston and other locations.
'The Departed' is screened for the first time at the Venice Film Festival to critical acclaim.
The movie 'The Departed' hits theaters across the United States.
Jack Nicholson receives the Golden Globe award for his role in 'The Departed'.
'The Departed' wins several Oscars including Best Picture, marking Martin Scorsese’s first Oscar win for directing.
Billy Costigan, from a working-class South Boston family, joins the Massachusetts State Police Academy to become an undercover officer.
As a child, Colin Sullivan is recruited and raised as an informant by mob boss Frank Costello, becoming a mole in the police department.
Detectives Queenan and Dignam select Billy Costigan to infiltrate Costello's criminal organization undercover.
Colin Sullivan officially joins the Massachusetts State Police and starts his career, secretly feeding information back to Costello.
The police set up an operation targeting Frank Costello's criminal syndicate, led by Trooper Billy Costigan undercover.
Billy successfully gains acceptance into Costello's inner circle and begins feeding intelligence to the police from inside.
Colin Sullivan actively sabotages police efforts and eliminates threats to Costello from within the department.
Detective Queenan is killed during a botched sting operation, raising the stakes and endangering Billy.
Billy Costigan and Colin Sullivan face off as rival moles trying to expose each other and take down Costello's empire.
Frank Costello is assassinated, leading to chaos and power struggles within the criminal organization.
In a final act of betrayal, Colin Sullivan kills Billy Costigan as he attempts to bring him to justice.
Colin Sullivan is exposed as a mole and is eventually killed, ending the infiltration within the police department.
