Continuity mistake: Near the episode's end, Danny gets into a shootout with Tommy in a house. The first two shots from Danny go into the wall. The next two shots, you don't see where they go as Danny runs to a different location. On Danny's next two shots, the wall doesn't have holes, and then two holes show up. With Danny out of bullets, he attacks Tommy from behind. When they wrestle, there are four holes now in the wall.
Blue Bloods (2010)
1 mistake in Ends and Means
Starring: Tom Selleck, Bridget Moynahan, Donnie Wahlberg, Len Cariou, Will Estes
Frank Reagan: I'm the PC. I know everything.
Trivia: Although Len Cariou plays Tom Selleck's father, he's only five years older than Selleck.
Question: What is the significance of the lapel pin worn by detectives on Blue Bloods?
Answer: It is an NYPD Detective Bureau lapel pin. If you zoom in on a pic of "Danny Reagan," you will see that the pin has the letters DB on it.





Answer: It is the lapel pin worn by members of the NYPD Honor Legion.
The lapel pin is on Danny but not Biaz, why? Also, Baker, Sid, Frank &Garrett wear one. Significance? Are they all the same?
Is the P.C.'s pin different than a legion pin? What are the symbols and their meaning?
I think it may be Masonic?
But why would the mayor wear one?