David gets a call from his mother that her pipes have burst and need to be fixed right away. He can't leave Hooper's Store unattended so he asks Susan and Luis to look after things, but they're busy (even Big Bird has to help his cousin Timalina put her nest back together). Cookie Monster has quietly been standing by the whole time and offers to look after the store. David laughs this off because he knows Cookie Monster can't be trusted alone with all the cookies in the store. Nevertheless, Cookie swears "monster's honor" with a brief ritual and David decides to take a chance. Alone in the store, smelling the open case of nearby cookies, Cookie wonders what he's gotten himself into. The Twiddlebugs try to get to the zoo.
—hammerhead-dk