In 2004, Shearer criticized what he perceived as the show's declining quality: "I rate the last three seasons as among the worst, so season four looks very good to me now." Shearer has also been vocal about "The Principal and the Pauper" (season nine, 1997), one of the most controversial episodes of "The Simpsons". Many fans and critics reacted negatively to the revelation that Principal Seymour Skinner, a recurring character since the first season, was an impostor. The episode has been criticized by both Shearer and Groening. In a 2001 interview, Shearer recalled that after reading the script, he told the writers, "That's "so" wrong. You're taking something that an audience has built eight years or nine years of investment in and just tossed it in the trash can for no good reason, for a story we've done before with other characters. It's so arbitrary and gratuitous, and it's disrespectful to the audience." In a December 2006 interview, Shearer added, "Now, writers refuse to talk about it. They realize it was a horrible mistake. They never mention it. It's like they're punishing audience for paying attention."