Rita makes her final speaking appearance in this cartoon. All of her future appearances would be silent. Her voice would not be heard again until Animaniacs: Wakko's Wish (1999).
As the Warners walk down the street, Porky Pig (animated in the old style) passes behind them.
This is the final Randy Beaman cartoon on Animaniacs.
The musical in the short, Cats of Phantom Boulevard, is a mashup of several Andrew Lloyd Webber musicals: Cats, The Phantom of the Opera, and Sunset Boulevard.
The Warners also parody scenes and songs from Lloyd Webber's Evita and Rodgers & Hammerstein's Sound of Music.