Starting in 1991, Klasky Csupo began producing "Rugrats", one of the first animated shows for Nickelodeon, which was inspired by the couple's two sons and what they would do if they could speak. Their next major series was "Duckman" for the USA Network. The show revolved around the home life and adventures of a dim-witted and lascivious private detective duck named Eric Duckman. The series ran from 1994 to 1997. During the same time, Nickelodeon released Klasky Csupo's second Nicktoon series, "Aaahh!!! Real Monsters". During this time, Klasky Csupo ended production on "Rugrats" because 65 episodes that they were contracted to do had aired (originally, due to the 65 episode rule). However, when "Rugrats" went into syndication, it exploded in popularity with ratings skyrocketing and advertising deals taking off, and Nickelodeon and Klasky Csupo resumed production on the series.