• Thomas as George
  • Percy as Harold
  • Henry as Captain Underpants
  • Gordon as Melvin Sneedly
  • Diesel 10 as Mr. Krupp
  • Elizabeth as Mrs. Ribble
  • Caroline as Mrs. Anthrope
  • Diesel as Dr. Diaper
  • D261 as Proffessor Poopypants
  • James as Tim Bronski
  • Terence as Stevie Loopner
  • George as The Bionic Booger Boy
  • Skarloey as Sulu
  • Rheneas as Crackers

and more

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