* CareerResurrection: The widely lauded movie is credited with completely restoring Affleck's credibility as an actor, as well as showing his good promise as a director. It also proved that ''Film/GoneBabyGone'' wasn't a fluke.
* DirectedByCastMember: Ben Affleck as Doug.
* EnforcedMethodActing: Self-inflicted. Jeremy Renner surrounded himself with actual convicted bank robbers in Charlestown to properly get into character as part of his research.
* ExecutiveMeddling: The studio wanted the book's ending [[spoiler: where Doug dies in Claire's arms]]. But test audiences disliked it and preferred the theatrical ending - [[SubvertedTrope so it was left in]]. The other ending was filmed and included as an extra in the Blu-Ray release.
* FakeAmerican: Claire and Fergie are played by British actors (the latter is also a case of FakeIrish).
* FakeIrish: {{Averted}} in some notable cases (e.g. Ben Affleck has Irish ancestry, which is expanded into Doug's character, and Slaine is outspokenly Irish-American and it is seen in his performance as Gloansy), but mostly played straight.
* PlayingAgainstType: Blake Lively, best known as the glamorous Serena van der Woodsen on ''Series/GossipGirl'' at the time, as a trashy alcoholic.
* ThoseTwoActors: Titus Welliver and Slaine were in the previous film that Ben Affleck directed, ''Film/GoneBabyGone'', which included Ben's brother Casey. Welliver and Victor Garber (Claire's boss) would also appear in Affleck's next film ''Film/{{Argo}}''.
* ThrowItIn: The sequence of a cop turning away as he sees the robbers escaping wasn't in the original script. Ben Affleck added it in after interviewing a bank robber in prison - who said it happened to him.
* WhatCouldHaveBeen: Mark Wahlberg was the original choice for James Coughlin, but he was too busy filming ''Film/TheFighter''. It was Casey Affleck who recommended Jeremy Renner to his brother. Ben Affleck would later call Renner the EnsembleDarkhorse in the cast.
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