Among the many obscure TV scores of John Williams there is the score for 6 episodes of the TV show: "Wayne and Shuster Take an Affectionate look at..." (1965) http://www.imdb.com/title/tt0060040/
1. The Marx Brothers 2. W.C. Fields 3. The Monsters 4. Bob Hope & Bing Crosby 5. The Westerns 6. Jack Benny
Influenced by zooba (and Thor) I present you here the End credits of the W.C. Fields episode. I think these are not the end credits of the show but it's only for the particular episode. (the score that is used throughout the episode has variations of this theme)