Mack and Mabel is a favorite among flop enthusiasts thanks to its unforgettable score and stellar cast album. But what else is there to this musical about (probably) real life lovers from the silent film era? We peel back the celluloid to explore that question, as well as a religious pretzel craze, our favorite Bernadette Peters roles, and the fascinating real lives of Mack Sennett and Mabel Normand.