Conversation so far:
How many seasons of Happy Tree Friends are there
A total of five seasons of the Happy Tree Friends have been released: 4 seasons on the internet, and 1 season on television.
Who developed Happy Tree Friends
Happy Tree Friends is developed by Aubrey Ankrum, Rhode Montijo, Kenn Navarro and Warren Graff for Mondo Media.

Question: When did the series start
Self-contained rewrite: When did the series Happy Tree Friends start