Watch the original theme song and opening credits of CatDog, as part of Nickelodeon's 25 Years of Animation celebration!

CatDog was created by Peter Hannan and premiered on April 4, 1998 -- the 9th official Nicktoon. The series follows the adventures of CatDog, twin brothers and complete opposites who share the same body. It ran on Nickelodeon for 68 episodes over 4 seasons.

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