• Professor Ned Brainard as Shawn
  • Betsy Carlisle as Min
  • Alonzo P. Hawk as BJ
  • A. J. Allen as Barney
  • Mr. Harker as Riff
  • TV announcer Rex Williams as Michael (uncredited)
  • Biff Hawk as Derek
  • Baby Walter as Baby Bop (voice)

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