Guest Stars Kevin Clash as Uncle Travelling Matt Dave Goelz voices Uncle Travelling Matt Dan Garza voices Junior Gorg Ben Durocher as Junior Gorg Frank Meschkuleit voices Pa Gorg Andy Heyward as Pa Gorg John Tartaglia voices Sprocket Donna Kimball voices Cotterpin Kanja Chen voices Pogey Dave Goelz voices World's Oldest Fraggle Frank Meschkuleit as World's Oldest Fraggle John Tartaglia voices Architect Andy Heyward voices Wrench Ali J. Eisner voices Turbo Dan Garza voices Philo John Tartaglia voices Gunge Aymee Garcia voices Majory the Trash Heap Karen Prell voices Icy Joe Donna Kimball voices Storyteller Frank Meschkuleit voices Large Marvin Ingrid Hansen voices Lanford John Tartaglia voices Barry Blueberry Aymee Garcia voices Henchy Kanja Chen voices Grizzard Kira Hall voices Measure Doozer Jordan Lockhart voices Development Doozer Aymee Garcia voices Research Doozer Dan Garza voices Periscope Doozer Co Starring Andrew Hey voices Background Singers Harvey Mason Jr. voices Background Singers Sam Ramirez voices Background Singers Britt Mason voices Background Singers Ana Krafchick voices Background Singers Binney Montgomery voices Background Singers