When Krusty takes a comedy roast of himself too seriously, and his father's last word to him was "Eh", he decides to retire; Lisa fears for Homer's health. This episode guest stars Kelsey Grammer, Don Hertzfeldt, Maurice LaMarche, Jackie Mason, David Hyde Pierce, Jeff Ross, and Sarah Silverman.
When Homer's attempts to get Bart to eat his broccoli result in them fighting, Marge puts them on a "Relation Ship" sailing ship; Marge drafts Homer's fantasy football team for him, but the trash talking gets to her. This episode guest stars Nick Offerman as Captain Bowditch.
When Mr. Burns's fracking operation is uncovered by Lisa, she gets the Speaker of the State Assembly to shut down the fracking, and ends up turning up the heat between the Speaker and Mr. Burns. This episode guest stars Jane Fonda as Maxine Lombard and Robert Siegel as himself.
Bart blows his nose on a sandwich that he puts into a time capsule, which, when combined with Milhouse's rabbit's foot and radioactive slime, creates mutant rabbits that turn into green creatures that look suspiciously like Bart and wreak havoc on New New York, resulting in Bender, Fry, Leela, and Professor Farnsworth from Futurama to go back in time to kill the source - whom they think is Homer. The cast of Futurama guest stars in this cartoon crossover.
Springfield Elementary has a new, no-nonsense, fourth grade teacher making life hard on Bart, but when Bart discovers how to get back at him, and solve Homer's problem of not having made a campsite reservation for Labor Day, "The Simpsons are going to...", er, the "Blazing Guy" festival. This episode guest stars Willem Dafoe as Jack Lassen, Kelsey Grammer as Sideshow Bob, and David Silverman as himself.
When Homer has a midlife crisis, he forms a band of Springfield dads. Despite the band's modest early success, Apu ends up being a breakout star and stealing the show. This episode also features the first appearance of Sideshow Mel's family. Guest stars include Sammy Hagar as himself and Will Forte as King Toot.
Marge kicks Homer out of the house after Moe convinces him to stay out all night on Christmas Eve at his bar. Depressed, Homer takes a lonely walk through Springfield instead of being with his family, who go out to find him when Moe confesses it was his fault.
The Simpsons are taken on the ride of their life when the "Rocket to Your Doom" in Diz-Nee-Land goes sky high and they end up on Rigel VII, where they are put in a zoo and must figure out a way to escape.
Homer is hypnotized at a circus into believing he is ten years old. Bart has fun with him at first, making him his new best friend and accomplice. However, it becomes a pain when the hypnotist dies and the family is unable to turn Homer into his old self again. This episode was written by Judd Apatow.
Elon Musk arrives in Springfield, where he and Homer become fast friends, but Musk (guest starring as himself) soon incurs the wrath of Mr. Burns when his ideas become over-the-top, prompting Homer to try to end their friendship.
When Moe discovers that Springfield's town anthem is also used by a number of other cities, Bart and Lisa write a new one, but when Homer's attempt to be part of a standing ovation ends up taking out a row of theater seats, he tries to get help losing weight - only to join a group that embraces being overweight.