Air date: 4/25/91
Lisa's teacher, Miss Hoover, is stricken with Lyme disease, and Mr. Bergstrom, a cool, witty, substitute teacher takes her place. Lisa is smitten with the smart, sensitive man, who contrasts so favorable; it seems, with her own father. Meanwhile, Bart decides to run for class president where he is expected to easily triumph over class brain Martin Prince. When Lisa comes to school one day, she is shocked to find that Miss Hoover has recovered and Mr. Bergstrom is gone. Meanwhile, Bart celebrates his victory, only to realize that neither he nor his friends bothered to vote, and Martin has won. Lisa tracks Mr. Bergstrom down to the train station, where he is leaving for another gig. But before he does, he hands her an note, reminding her “You Are Lisa Simpson”. That night Homer cheers up a disconsolate Bart and Lisa, showing he's not such a bad dad after all.
The War of the Simpsons
Air date: 5/2/91
The Simpsons throw a party, inviting all their friends from the neighborhood. Homer gets very drunk and behaves like a perfect lecherous ass. Very upset with his behavior, Marge signs them up for a weekend marriage retreat. Homer is distraught until he realizes that the retreat is on a lake and he'll be able to sneak in some fishing. Marge and Homer leave the kids in the care of Grampa, and Bart and Lisa immediately try to take advantage of the old man's gullibility . At the retreat, Marge and Homer have difficulty reconciling their differences, particularly after Marge catches Homer sneaking off to go fishing. At home, the kids throw a party which gets out of hand, prompting Grampa to start crying. Afraid he'll get in trouble, the kids begin to frantically clean up. Meanwhile, Homer catches a legendary catfish, General Sherman, but to prove his love to Marge he throws it back in the lake. They happily return home to find a clean house and chuckling Grampa, who has conned the kids into doing what he wants.
Three Men and a Comic Book
Air date: 5/9/91
Bart attends a comic book convention and decides he wants to buy the first issue of “Radioactive Man” comics for $100. He tries and fails to earn the money in various ways, including helping elderly neighbor Mrs. Click, who works him like a horse then gives him a quarter. So Bart decides to go in with Millhouse and Martin, both of whom want the comic, though neither has enough money. They soon find that joint ownership is more difficult than it seems, as none of the three ants to let the comic out of his sight. Bart goes temporarily insane, tying up Martin and fighting with Millhouse, until the comic is blown into a driving rainstorm and destroyed, leaving the three boys to ponder the evil of greed.
Blood Feud
Air date: 8/11/91
When Mr. Burns needs a blood transfusion, Homer is pleased to learn that Bart has the same rare blood type. Bart donates his blood and saves Burns, but Homer is upset to find that Burns sends him nothing more than a thank-you note. Homer writes an angry letter in response, then thinks better of it, but discovers to his alarm that Bart has already mailed it. Homer tries to recover the letter, but fails, and a furious Burns reads the letter and vows revenge. But Smithers convinces Burns that the Simpsons have indeed down him a favor and, in gratitude, Burns buys them a rare Olmec Indian Head. The Simpsons are unsure what to make of the gift.