Homer battles mutants after Springfield is annihilated by a neutron bomb; Bart has his DNA mixed with a fly; Marge is revealed to be a witch in colonial Springfield.
A damning report on childhood obesity in Springfield leads to the formation of a pee-wee football team. After belittling Ned Flanders, Homer ends up coaching the team, but his favoring of Bart makes him unpopular.
When Bart accidentally burns down the family's Christmas tree and gifts, he claims that a robber stole everything. As a result, the town gets them a new tree and pitches in to raise funds.
Homer and Moe attempt insurance fraud so that Moe can support his new girlfriend. When Homer ends up in jail, Moe has to decide whether or not to come forward.
Homer is forced to spy for the IRS after an audit. But when he is asked to retrieve a trillion dollar bill from Mr. Burns, he switches sides and the two flee to Cuba for refuge.
After humiliating Bart at a church picnic, Homer resolves to get in shape. Soon, he is contacted by an energy bar company that wants him to climb a mountain as a promotion.