Episode 3073




 * Little Jerry and the Monotones perform "Mad."


 * Grover and Christopher discuss love.


 * Sinister Sam announces that someone has bought the last box of crayons, and he wants to know "why." It turns out that he just wants a crayon so he can learn how to draw the letter Y.


 * Guy Smiley hosts "What's Prairie's Problem?"


 * Gordon reads the kids the story of "Numberella."


 * Bert sings "Keep the Park Clean for the Pigeons."


 * Elmo demonstrates top and bottom.


 * "The Ballad of Slippery Slim"