Peter Potamus, Time Traveler is an animated film produced by Warner Animation Group and based on the Hanna-Barbera character Peter Potamus. It is the fourth film in the second phase of the Warner Bros. Hanna-Barberaverse and the fourteenth film overall.


Peter Potamus is a hippo who discovers that his father had a magical time-traveling balloon. So, Peter and his monkey friend So-So use it to travel into World War I. However, it doesn't take long before they catch the attention of a corrupt pilot named Dread Baron and his dog sidekick Mumbly. They must find a way to travel back to the present.


  • Chris Edgerly as Peter Potamus
  • TBD as So-So
  • TBD as Dread Baron
  • Frank Welker as Mumbly
  • TBD as Colonel Fusby
  • TBD as Touché Turtle
  • TBD as Dum Dum
  • TBD as Yippee
  • TBD as Yappee
  • TBD as Yahooeey


  • Dread Baron and Mumbly are from Scooby Doo's All-Stars Laff-A-Lympics.
  • In the film, it is revealed that Dread Baron and Mumbly are ancestors of Dick Dastardly and Muttley respectively. This was not the case in Scooby-Doo's All Stars Laff-A-Lympics, as Dick Dastardly and Dread Baron were brothers.
  • Peter Potamus and So-So meet a few different Hanna-Barbera characters as they time travel.
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