Character mistake: Sergeant Gormley is promoted to Lieutenant in the previous episode. In this episode he is referred to as Sergeant Gormley by Commissioner Reagan and Deputy Commissioner Garrett Moore at least twice.
Blue Bloods (2010)
Episode list - season 9
Starring: Tom Selleck, Bridget Moynahan, Donnie Wahlberg, Len Cariou, Will Estes
More mistakes in Blue Bloods
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: Why why does Danny always yell, "hey!" When he's is a half a block from the perpetrators which gives the perpetrators 1/2 block head start running from Danny. Why doesn't he wait until he's close to him and he wouldn't have to chase him so far?
Answer: It's a common cop show plot device. If the police on the show always acted in the most logical way (i.e. not alerting a suspect to their presence) the show wouldn't have the opportunity for an exciting foot chase.