Rugrats
In 1996, Klasky Csupo Animation began producing new episodes, and the show's fourth season began in 1997. As a result of the show's popularity, a series of theatrical films were released over the next five years: The Rugrats Movie, which introduced Tommy's younger brother Dil Pickles, was released in 1998; Rugrats in Paris: The Movie, which introduced Kimi, Kira, and Fifi, was released in 2000; and Rugrats Go Wild, a crossover film with another Klasky Csupo series, The Wild Thornberrys, was released in 2003. The final TV episode aired on August 1, 2004, bringing the series to a total of 172 episodes over nine seasons. The 13-year run (with the 2-year break) ties Rugrats with King of the Hill as one of the eighth-longest-running American animated television series. The show is Nickelodeon's third longest-running animated series, behind SpongeBob SquarePants and The Fairly OddParents. It is one of the longest running animated series of all time.