Continuity mistake: In Season 2, Episode 19 ("Checkmate"): Detectives Torres and Moreno respond to a radio call reporting gunfire at 300 East 85th Street, which they acknowledge. We then see the suspect exit the building and escape in a car, and the detectives run unto the same building a few seconds later. The building number however is 237, not 300. (00:33:35)
Visible crew/equipment: While J.C. and Eddie begin interrogating Leroy, when J.C. mentions Marcus and says, "He caught one in the back," an actor's T-mark is taped to the floor behind Leroy's chair. (00:10:20)
Moreno: Did you sleep with her?
Eddie Torres: I don't think you would call what we did sleeping.