Special Guest Stars Joe Mantegna voices Gordus Antonius Michael Palin voices Museum Curator 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 Alex Désert voices Carlum Kevin Michael Richardson voices Jupiter Maggie Roswell voices Helen Lovejoyususus