Nicholson's nephew Binky borrows the Howdy Doody adventure book, and another book called *The Phantom of the Doody-O Studio gets delivered back to Bob and Happy instead. Soon, the book and other items disappear, and Bob has his hands full trying to unmask the Phantom with the help of his wacky pals, but the answers will take Doodyville by surprise.

"Music Appreciation Week" features all sorts of Doodlers, who show how much fun it can be to play an instrument or sing, and a guest appearance by conductor Leonard Birdstune. It also marks a return visit by the G-Man, a former Doodler who recalls his old feud with Clarabell (Lew Anderson), and the world premiere of the Doobyville symphony orchestra.

Bob brings gifts for the gang back from Schlocksville, but after Clarabell (Lew Anderson) and Corny accidentally break Dilly Dally's bionic man, he requests a life-size replacement! When visiting genius Professor Zweistein turns a dummy of Clarabell into a bionic clown, Phineas T. Bluster tries to use it to make himself the most powerful person in Doodyville.

Clarabell (Lew Anderson), bandleader Jackie Davis, Doodyville mayor Phineas T. Bluster, and Sandra Witch each claim to be the world's greatest magician, so Bob holds a contest. You'll also see some contestants from the Peanut Gallery demonstrating their own tricks, and environmental messages from special guest stars Woodsy Owl and Smokey the Bear.