Santa's Little Helper event; however, their plan fails and a drunk shark that's discovered at the event becomes the new mascot instead. Santa's Little Helper gladly returns to the Simpson family. Santa's Little Helper's initial appearance on "The Simpsons" was in the first episode of the series, "Simpsons Roasting on an Open Fire", which aired on Dec. 17, 1989. Since then, he has become a recurring character. "The Simpsons" creator Matt Groening told "TV Guide" in 2000 that "we [the staff] painted ourselves into a corner with our Christmas episode. Once we wrote the dog into the show, we were stuck with him."
The Simpsons longest-running sitcom (animated or live action) in the United States. In 2009, "The Simpsons" surpassed "The Adventures of Ozzie and Harriet"s record of 435 episodes and is now recognized by "Guinness World Records" as the world's longest running sitcom (in terms of episode count). In October 2004, "Scooby-Doo" briefly overtook "The Simpsons" as the American animated show with the highest number of episodes (albeit under several different iterations). However, network executives in April 2005 again cancelled "Scooby-Doo", which finished with 371 episodes, and "The Simpsons" reclaimed the title with 378 episodes at the end of their seventeenth season. In May