CatDog is an American animated television series created by Peter Hannan for Nickelodeon. The series depicts the life of conjoined brothers, with one half being a cat and the other a dog. Nickelodeon produced the series from Burbank, California. The first episode aired on April 4, 1998 (following the Nickelodeon Kids' Choice Awards), before the show officially premiered in October that year. The Season 2 episode "Fetch" was also shown in theaters with The Rugrats Movie before airing on TV.
The series aired on Nickelodeon from April 4, 1998 to June 15, 2005 for four seasons and 68 episodes. The series was produced by Nickelodeon Animation Studio and Peter Hannan Productions and has been released on DVD in Region 1 by Shout! Factory.