Modern-day viewers are surprised to see that it's Carol Burnett, and not guest star Liza Minnelli, who performs the song "Cabaret." At the time this episode was filmed, "Cabaret" was a hit tune from the Broadway musical of the same name. Liza Minnelli had been in the running for the part of Sally Bowles on stage, but she lost out to Jill Haworth, largely because she could not muster a British accent. It would be another five years before Minnelli would have the opportunity to put her stamp on the role in Bob Fosse's 1972 film version, which portrayed Bowles as an American.