Santa's Little Helper of their sacrifices and starts treating him badly, causing him to run away. He ends up in the possession of Mr. Burns, who trains him to become a vicious attack dog. Several days later, Bart stumbles upon the trained Santa's Little Helper and is attacked, but the greyhound eventually recognizes his old friend and stops. In "The Canine Mutiny" (season eight, 1997), Bart uses a fake charge card to buy a well-trained rough collie named Laddie from a mail-order catalog. Laddie learns many tricks that Santa's Little Helper is completely unable to perform, and the Simpson family nearly forgets about
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