Character mistake: Gloria Reuben, referring to a suspect in custody, states in a press conference, "To the parents of the teenagers who were killed today. Know that Kyle Ferguson will be prosecuted to the fullest existence of the law." That word should be "extent". (00:06:19)
Continuity mistake: From last Season 14, episode 18 of Blue Bloods to this new spinoff series Boston Blue, Danny's hair is darker and thicker. He also lost his widow's peak.
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)
Suggested correction: Sean lives in Boston and is a proud member of the Boston PD. He would cheer for his home team.
Continuity mistake: S1 E1 Faith and Family Facial recognition software was run against the suspect and it was a 72% match certainty, and the detectives state it. However, when questioning a suspect, they show the facial recognition document and it's a 99% match. (00:30:05 - 00:51:09)
Suggested correction: They used it twice in that episode. The first suspect was released, but the second was the perpetrator. That was the whole conflict for the Superintendent, using it two times on one case.
