The Muppet Show - Season 1 Episode 20 Kaye Ballard

Tired of the "embarrassingly square" theme song, bass player Floyd Pepper informs Kermit that he and the rest of the orchestra pit (except Rowlf) are quitting. Kermit says their conductor Nigel will write a new theme, but Floyd refuses: "He wrote the first one, man." Floyd performs his idea for a new theme, a dreadful Zappa-esque piece called "Fugue for Frog." Kermit won't use it and refuses that Floyd submits to Kaye Ballard a petition about the theme song, so the band leaves. The closing theme is performed solo by Rowlf on the piano.