Peter Potamus is a cartoon made by Hanna-Barbera. It was first shown on television on September 16, 1964. The main characters are a friendly purple hippopotamus called Peter Potamus and his friend So-So the monkey. Together they explore the world in a time-traveling hot-air balloon. Peter has a special "Hippo Hurricane Holler" that helps him blow away his enemies.
- "The Peter Potamus Show". The Internet Movie Database (IMDb). http://www.imdb.com/title/tt0250908/. Retrieved 2008-06-30.