The Wayne Ball is held at the Fledermaus Gallery. "Fledermaus" is German for "bat."
The exterior of the Gotham City Police Department is the U.S. Customs House in lower Manhattan. This same building was used for the exterior of the party in Batman Forever (1995).
The butler Jacob Skolimski is played by Daniel Davis, who became famous after playing another butler in The Nanny (1993)
Bruce Wayne and Selina Kyle have a dance scene at the ball. This episode continues the unofficial tradition of having the two characters having a dance scene from previous on-screen appearances: The Dark Knight Rises (2012), Batman Returns (1992) and Batman: The Movie (1966), although Catwoman was using another name instead of Selina Kyle.
Guest star Daniel Davis appeared in the 2006 film "The Prestige" with Christian Bale and Michael Caine, who appeared as Bruce Wayne and Alfred Pennyworth in Christopher Nolan's Batman trilogy.