|Air date||December 29, 1969|
|Season||Season 1 (1969-1970)|
|Sponsors||L, U, Y, 4, 5|
- Cartoon: A man uses a ladder to climb up to the top of a capital L.
- Alphabet Bates makes the letter U.
- Cartoon: "Poverty U" -- A figure gives a salute to the letter U, and presents the letter with a bouquet of flowers.
- Speech Balloon: Y -- Yo-Yo (aired twice)
- Ernie and Bert: Ernie writes a dramatic story, which is actually the alphabet. (First: Episode 0009)
- Film: A boy with magic glasses listens to the sounds of an ice cream truck, a dog, a horse galloping, and a parrot. (First: Episode 0008)
- Film: Three boys (including Brian Henson) pretend to be steam shovels, playing in the dirt. This segues into footage of real construction vehicles. A parallel is drawn between the machinery and how the boys' arms and mouths work. (First: Episode 0003)
- "Triangle and Square": A male voice narrates a story of a jazzy triangle who loved to dance, and a square square. The triangle likes being flexible, but the square would rather be stiff and *square*. (First: Episode 0007)
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|Episode 0035||Episode 0037|