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. The episode "Fetch" was also shown in theaters with The Rugrats Movie.The series ran until June 15, 2005.