Seth Green guest stars as Vinnie in this episode of the überpopular children's series, which includes some of the show's best-loved segments: "Global Grover," "Elmo's World," "Number of the Day" and "Letter of the Day." After Telly Monster becomes a member of the titular club, Vinnie delivers him a mountain of missives that threatens to take over Hooper's store. Later, Grover shares his expertise on how to prepare for a hula party.