Revealing mistake: In the opening credits (the very beginning), Jake is walking and the image behind him is blurred. When it unblurs (right before it the shot changes), the phone number on the building behind him is 213 which is LA, vs. 718 which is Brooklyn.

Brooklyn Nine-Nine (2013)
1 revealing mistake in show generally - chronological order
Starring: Andy Samberg, Terry Crews, Stephanie Beatriz, Melissa Fumero
Revealing mistake: When Charles shows the picture of the horse and says "look what you get when you search for 'Charles Boyle medal of valor'" he's typed "peanut butter the horse" into his phone.
Operation: Broken Feather - S1-E15
Adam Sandler: This is terrible, you don't know what you're doing.
Jake Peralta: Adam Sandler?
Adam Sandler: Yeah, that's right. I collect antiquities. I'm a serious person. I'm writing a movie right now, about the Russian revolution.
Jake Peralta: Oh, really? Who does Kevin James play in it?
Adam Sandler: Ha ha. It's a serious movie...Trotsky.
Jake Peralta: Ah, there it is.
Adam Sandler: But he's got a wife who never wears a bra. [To the guy next to him] I think you're going to like it.
Jake Peralta: Thanks for dressing up, by the way.




