• Bart Simpson as Basil
  • Milhouse Von Houten as Dr. Dawson
  • Lisa Simpson as Olivia Flaversham
  • Homer Simpson as Hiram Flaversham
  • Marge Simpson as Ms. Judson
  • Santa Little Helper as Toby
  • Barney Gumble as Fidget
  • Sideshow Bob as Ratigan

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