Visible crew/equipment: At the start of the episode, the first character (Cole) has an audio wire sticking out the back of his suit. It disappears in the next shot. (00:00:25)

Blue Bloods (2010)
1 mistake in Mercy - chronological order
Starring: Tom Selleck, Bridget Moynahan, Donnie Wahlberg, Len Cariou, Will Estes
Frank Reagan: And I don't have a Teflon suit. Everything gets to me. Every time one of ours is hurt, or jammed up, or he's in over his head, it gets to me. I just don't show it, 'cause I can't show it, 'cause nobody wants, or needs, a sensitive police commissioner.
Sid Gormley: OK.
Frank Reagan: So screw you!
Sid Gormley: Yes, sir. That an order, too?
Frank Reagan: Yeah, that's an order.
Sid Gormley: Screw me. I'm on it, boss.
More trivia for Blue Bloods
Question: What is the pin Mayor Dutton is wearing?





Answer: The Seal of the City of New York.