Original poster artwork · Great Cinema Master List
Spoiler-free premise
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.
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Boston police place recruit Billy Costigan inside Frank Costello's criminal organization while Costello's protégé Colin Sullivan rises within the state police. Each institution unknowingly shelters the other's informant, and both men are ordered to identify the leak.
Why it belongs
Under Martin Scorsese, mirrored infiltrations, coded calls, aggressive cutting, and contrasting star performances make impersonation in The Departed physically and morally exhausting.
Read expanded why it belongsThe fuller editorial case+
Scorsese drives the mirrored infiltration through aggressive cutting, phone calls, coded messages, sudden violence, and Leonardo DiCaprio and Matt Damon's contrasting performances, making professional impersonation feel physically exhausting and morally corrosive.