T.U.F.F. Puppy is an American action animated comedy television series created by Butch Hartman for Nickelodeon. It premiered on October 2, 2010 on Nickelodeon along with Planet Sheen, which premiered a half hour earlier. T.U.F.F. Puppy is Hartman's third animated series for Nickelodeon, after The Fairly OddParents and Danny Phantom. The series was cancelled after its third season and aired its final episode on April 4, 2015.[1] The first two seasons consist of 26 episodes each, and the third season consisted of eight episodes, for a total of 60 episodes.