Sesame has sprung a leak. While Susan runs to tell Maria and Luis about the flood, Ernie and Bert’s beds become sailboats. Help, Gordon, help! Special guest star John Krasinski floats by to explain the word “soggy.” Plus, in Abby's Flying Fairy School, the pals meet Morty the Musical Muse, and there’s more fun with Super Grover 2.0. Finally, Murray experiments with a Rube Goldberg contraption, and step to it, because Elmo's World is all about feet.