The Purge Planet is an unnamed planet that appeared in the episode Look Who's Purging Now. It is a planet that exists in the Replacement dimension, and is home of cat-like humanoids. On this planet, everyone is very blissful and happy toward everyone because every year there is a purge, where all laws are suspended for the night and everyone is free to kill whoever they want, releasing their anger without consequences.
- The Purge planet is an obvious homage to The Purge franchise of movies, wherein the United States has made all crime including murder legal for a single 12 hour period once a year. This event significantly affected the lower classes such as the Homeless (who are seen as worthless to society), while the upper classes were able to afford security.