After Bart gets hit by a car driven by Mr. Burns, Homer is manipulated by ambulance-chaser Lionel Hutz into bringing an outrageous lawsuit against his boss.
Homer meets his half-brother Herb Powell, an automobile tycoon who zealously bonds with the family and tasks Homer with designing a car for the average American.
After an uncontrollable Santa's Little Helper destroys several important Simpson possessions, Homer announces that he will be thrown out of the house unless he completes obedience training.
After rekindling her artistic talents, Marge is commissioned to paint a portrait of Mr. Burns; Homer vows to lose weight after getting trapped in a water slide.
Homer must decide whether he should complete marriage counseling or skip out to catch a legendary catfish; Bart and Lisa take advantage of Grampa's ignorance of the house rules.
Bart, Milhouse and Martin each pitch in to buy an highly-collectible "Radioactive Man" comic book, which soon has a disastrous effect on their friendship.
After winning a political essay contest, Lisa is invited to Washington, D.C., but she soon becomes upset after discovering how policy-making really works.
After having a horrible day, Bart gets a job tending bar for a group of gangsters and becomes the prime suspect when Principal Skinner mysteriously disappears.
The Simpson family receives a severed monkey's paw which can grant wishes, Bart gains magical powers which he uses to turn Homer into a Jack-in-the-box, and Mr. Burns uses Homer's brain to create a robot.
Burns decides to retire and sells the power plant to a German consortium for an exorbitant price. Homer's laziness and inefficiency are quickly exposed by his new bosses, and he is laid off.