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 Kimberly Brooks voices Kindergartener Tress MacNeille voices Martha Tress MacNeille voices Tracey Pamela Hayden voices Laughing Children Chris Edgerly voices Doctor Jonathan Lipow voices Farm Animals