Special Guest Stars Kerry Washington voices Rayshelle Peyton Guest Stars Alex Désert voices Carl Carlson Pamela Hayden voices Milhouse Van Houten Kevin Michael Richardson voices Dr. Julius Hibbert Pamela Hayden voices Miss Springfield Pamela Hayden voices Nurse Grey DeLisle Griffin voices Riley Chris Edgerly voices Doctor Kimberly Brooks voices Kindergartener Tress MacNeille voices Martha Tress MacNeille voices Tracey Pamela Hayden voices Laughing Children Jonathan Lipow voices Farm Animals