List of Happy Tree Friends episodes

This is a list of Happy Tree Friends episodes. So far, there are total of 5 seasons that have been aired (4 on the internet and 1 on TV). In 1999, the crew began the series with two pilot episodes. The very first pilot was named Banjo Frenzy, which featured a blue dinosaur, a sky-blue squirrel, a yellow rabbit and a purple beaver. The second pilot was named Spin Fun Knowin' Ya! and featured later versions of the dinosaur, the rabbit, the squirrel and the beaver and, from that on, the crew began introducing new characters to the show. It quickly became an internet phenomenon featuring millions of visits per episode. The TV series first aired in 2006.

A spin-off called Ka-Pow! debuted on September 2008. In 2010, after airing fifteen episodes for the third web season, a hiatus began, in which there were only Break shorts airing with a subliminal message at the end of each, which reads "Happy Tree Friends is dead!". This situation concerned many fans because they thought that the series were going to end soon. The writers confirmed that they were playing a joke on the fact that the characters die a lot and made a pun phrase with the word "dead". The hiatus ended on December 8, 2011 and the series returned once again with the fifteenth episode of the third season, which was named "Clause for Concern".

In addition to the show's five seasons and a spin-off, there have been some special episodes and shorts. These include eleven "Smoochies", ten "Kringles", thirteen "Break" shorts, five "Love Bites", and sixteen other irregular episodes that are unindexed. The "Smoochie" shorts involve three different items being dropped next to a main character, only for them to be killed in three different ways, each regarding the item. These have been adapted into the Happy Tree Friends website where one can choose an item to drop. The "Kringle" shorts are Christmas-themed shorts that feature the main characters doing various Christmas-related tasks, only to be killed in various ways. The "Love Bites" were Valentine's Day-themed shorts, that went with the basic structure of a Happy Tree Friends episode. The "Break" shorts were produced in 2008, when no new episodes were produced until the following year. A new break short debuted in 2009.

Mondo Media announced plans to produce a feature film based on the series. The movie is currently in pre-production.

The pilot episode created on December 17, 1999 featuring early versions of the characters Lumpy, Giggles, Cuddles and Toothy.

A Fall Out Boy music video featuring Happy Tree Friends characters.

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