After Rizzo and the other rats have been a nuisance throughout the Muppet Theater during The Muppet Show episode 503, Miss Piggy and Beauregard convince them that they get to eat only after they entertain and spread happiness. In their plea with Kermit to join the Muppet family, Joan Baez helps to bring everyone together by leading the cast in the finale performance of "Will the Circle Be Unbroken".