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 episode guides the 2003 episode "Today I Am a Clown", where Lisa uses it to remind Homer that Santa's Little Helper was supposedly neutered in a previous episode (specifically, "Two Dozen and One Greyhounds"). The guide provides an episode-by-episode history of the first eight seasons of "The Simpsons". Each episode is covered in either one or two pages, featuring a synopsis, credits, pictures, and memorable quotes, as well as the episode's chalkboard gag. Obscure or hidden jokes are also brought to attention. The episodes are arranged in chronological order, and at the beginning of each season are two-page special features, such as