When Patrick Jane visits the club and Glennda Snow, played by Carlton Wilborn , introduces him to the other drag queens, among them is Miss Labelled, in full-80s Madonna drag, and Patrick says "nothing wows like vintage Madonna." Carlton Wilborn was the lead dancer for two of Madonna's world tours, and features in the documentary, Strike a Pose (2016) , about the Truth or Dare tour in 1990.
Guest star Wilke Itzin is the son of Gregory Itzin, who had a recurring role earlier in the series as Lisbon's boss.
The book Agent Cho picks up as he questions Gabriel Lamb is Sometimes a Great Notion (1964) by Ken Kesey.
Wizard of Oz references:
Ruby slipper found in alley.
Jane "looks behind the curtain."
Glenda/Glinda the Good Witch.
Summer looks at small dogs.
Judy Garland drag queen.
Fifi/Judy sings "Over the Rainbow".
Red-haired actress: Hillary Tuck. Also Carlton Wilborn in a wig, in drag.