• Dr. Elena Kinder as Grundgetta
  • Dr. Heep as Oscar the Grouch
  • Dan as Big Bird
  • Robin as Zoe
  • Lenny as Ernie
  • Margo as Abby Cadabby
  • Dickie as Telly Monster
  • Goon Ray as Biff
  • Goon Bob as Sully
  • Sylvester as Snuffy
  • Lexi as Prairie Dawn
  • Carrie as Rosita

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