Special Guest Stars Ian McShane voices Artemis Guest Stars Alex Désert voices Carl Carlson Pamela Hayden voices Milhouse Van Houten Kevin Michael Richardson voices Dr. Julius Hibbert Maggie Roswell voices Helen Lovejoy Grey DeLisle Griffin voices Sherri Grey DeLisle Griffin voices Terri Eric Lopez voices Bumblebee Man Tress MacNeille voices Barney Gumble's Mother Tress MacNeille voices Oktober Fest Bartender Melanie Minichino voices Omelet Woman Chris Edgerly voices Office Guard Tony Rodriguez voices Audience Tony Rodriguez voices Contestants Cesar Mazariegos voices Grampa Baby