• Dash Parr as Greg
  • Winston Deaver as Murray
  • Lucius Parr as Anthony
  • Jack Jack Parr as Jeff
  • Helen Parr as Dorothy the Dinosaur
  • Rick Dicker as Wags the Dog
  • Bob Parr as Henry the Octopus
  • Violet Parr as Magdalena the Mermaid
  • Evelyn Deaver as Flora Door
  • Screech as Sam
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