When Brass goes to investigate Delgado at strip club the song playing is "Dear Father" by Black Sabbath who starred 6 episodes ago in the 13th season finale (season 13 episode 22) "Skin In The Game".
Ted Danson and Peri Gilpin previously appeared together on an episode of Frasier (1993), episode 2.16, The Show Where Sam Shows Up (1995).