Homer becomes fed up with Santa’s Little Helper, who continually destroys things. He says he will get rid of him unless he goes to an obedience school. Bart, Lisa and Maggie have grown to love the dog and promise to train him. Santa’s Little Helper does poorly there, as Bart is unwilling to use a choke chain. The night before the final exam, Bart and Santa’s Little Helper play on Lisa’s suggestion, thinking it will be their last few hours together. This bonding breaks down the communication barrier, meaning Santa’s Little Helper can now understand Bart’s commands, thus passing obedience school much to the family’s (except Homer’s) happiness. Meanwhile, Lisa has the mumps.
Guest star: Tracey Ullman.