First appearance of James Pickens Jr. in the series, although he would go on to play Lt. Joe Abner in the other shows.
James Pickens Jr. (Nathan Foster) appeared later in CSI: Miami with David Caruso (John Kelly).
Det. John Kelly's vehicle is a Chevrolet Caprice, NY plate VLC-222, which is the same as the license plate on the truck Ross drives in Friends, Season 3 episode 18. David Schwimmer, who played Ross, also played Josh "4B" Goldstein in the first four episodes of NYPD Blue.