Cartoon: Two boys notice a D, saying it looks fat. A resonant voice (Gary Owens) informs them that it's the letter D. This leads to a jazzy story about a dog who digs for dice, wins a duck, and buys a dinosaur with a dime. Moral: "If you dig a dinosaur, drop your duck for a dime."
Cartoon: A small man and his assistant Dudley attempt to demonstrate both the capital and lower-case letter D.
Speech Balloon: D -- Dog (role reversal between man and dog) (aired twice)