Edward Villela's son Roddy appears in the episode. Roddy's mother's last name is Greschler. This is Murray the Cop's last name.
Tony Randall actually had studied ballet, had been a student of Martha Graham, and was nominated for a Tony award for dance, in the Broadway musical, "Oh, Captain!".
The episode's title was an obvious play on the movie "Last Tango in Paris," which had just come out in the theaters. The "Swan Lake" ballet that was performed by the girls, however, was a performance and concert dance; the tango is a partner and social dance.