Special Guest Stars Foo Fighters as Themselves Guest Stars Kevin Clash voices Uncle Travelling Matt Dave Goelz as Uncle Travelling Matt Dan Garza as Junior Gorg Ben Durocher voices Junior Gorg Frank Meschkuleit as Pa Gorg Andy Heyward voices Pa Gorg John Tartaglia voices Sprocket Donna Kimball voices Cotterpin Kanja Chen voices Pogey Dave Goelz as World's Oldest Fraggle Frank Meschkuleit voices World's Oldest Fraggle John Tartaglia voices Architect Dan Garza voices Philo John Tartaglia voices Gunge Aymee Garcia voices Majory the Trash Heap Karen Prell voices Icy Joe Kira Hall voices Melody Merggle Aymee Garcia voices Bongo Kanja Chen voices Ferguson Merggle Co Starring Sam Ramirez voices Background Singers Andrew Hey voices Background Singers Harvey Mason Jr. voices Background Singers Britt Mason voices Background Singers Ana Krafchick voices Background Singers