Mr. Chatterly, about to contemplate today's letter.
Alphabet Chat is a series of Sesame Street sketches hosted by Mr. Chatterly that attempts to intellectually discuss letters of the alphabet.
Only five sketches were made, with the first airing in 1975 and the last in 1994. The first few sketches began with a TV set crew preparing everything, then starting a take under the theme song. The theme, composed by Sam Pottle, features Jerry Nelson and Richard Hunt singing a variant of "The Alphabet Song" based on Bach's Fugue No. 2 from The Well-Tempered Klavier.
Unfortunately, after filming begins various people and animals or crew members wander aimlessly on-set (much to the chagrin of Mr. Chatterly, who attempts to keep the lecture going). Eventually Mr. Chatterly becomes so frazzled that he cannot continue, and starts bawling.
Later installments dropped the "behind the scenes" aspect of the segments and were written as actual, completed episodes with Muppet guests. This did not alter the content, however, as Mr. Chatterly still had to contend with bizarre, out-of-control lectures stemming from the topic letter.
