Special Guest Stars Michael Palin voices Museum Curator Joe Mantegna voices Gordus Antonius Guest Stars Pamela Hayden voices Jimbo Jones Chris Edgerly voices Crowd Members Tress MacNeille voices Juno Tress MacNeille voices Diana Chris Edgerly voices Slaves Uncredited Kevin Michael Richardson voices Jupiter Alex Désert voices Carlum Maggie Roswell voices Helen Lovejoyususus