Peter Potamus is an animated television series produced by Hanna-Barbera and first broadcast on September 16, 1964. (Early promotional materials for the series carried the title Peter Potamus and his Magic Flying Balloon, but that title never appeared on screen.)
Peter Potamus is an anthropomorphic hippopotamus.
Peter Potamus the hippopotamus (voiced by Daws Butler impersonating Joe E. Brown) and his sidekick, So-So the monkey (voiced by Don Messick) are exploring the world in Peter's time-traveling hot air balloon. When faced with a certain situation, Peter uses his Hippo Hurricane Holler technique to blow away his opponents.
Peter Potamus (voiced by Joe Alasky in his debut episode and Chris Edgerly afterwards) works at the law firm of Sebben & Sebben as a lawyer. The former star of Peter Potamus, he has taken the role of annoying co-worker, as well as an accomplished lecher and glutton.