Other mistake: Ballard and Laffont head to the country club to talk with a suspect in their cold case. Laffont takes a photo out of his jacket, looks around, and says, "There he is." Then they walk over to the suspect, whose back is to them, and who turns around when they approach. No way they could have confirmed the person was the same as the one in the photo from behind them.
Other mistake: Danny and Sean are at a Boston Red Sox game at Fenway Park, and Sean is wearing a Red Sox cap. There's no way a true New Yorker would ever wear a Red Sox cap in the company of his diehard New Yorker father. (00:56:28)
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Suggested correction: Sean lives in Boston and is a proud member of the Boston PD. He would cheer for his home team.