Lisa attends a performing arts camp and is inspired to "embrace her creative side" by her counselors and fellow campers. When she returns, Lisa fails to readjust to her mundane life and attempts to recapture her "inner hipster." This episode guest stars Flight of the Conchords (Jemaine Clement and Bret McKenzie), Ira Glass, Stephen Hawking, Lea Michele, Cory Monteith and Amber Riley.
Lisa helps fund Nelson's bicycle company with money Grandpa Simpson gives her as part of his inheritance, but after Nelson meets Facebook founder Mark Zuckerberg and is convinced he can be successful by dropping out of school, Lisa tries to show Nelson the importance of an education. Meanwhile, Marge and Homer get addicted to buying expensive items and returning them for bogus reasons.
Lisa coaches Bart's Little League baseball team to a record winning streak by putting her book smarts in statistics and probability into play. But when Bart questions Lisaís coaching tactics and confronts her for taking the fun out of baseball, Lisa benches him from the championship game. This episode guest stars Mike Scioscia and Bill James (with a special appearance by Banksy who animated the episode's couch gag).
In the 21st Treehouse of Horror episode, Bart and Milhouse get trapped inside a cursed board game in "War and Pieces," Homer and Marge suspect a castaway of being a murderer in "Master and Cadaver," and Lisa falls for a preteen of the night in "Tweenlight." This episode guest stars Hugh Laurie and Daniel Radcliffe.
When Lisa finds out that Marge used to be as smart as Lisa before she slacked off, Lisa decides to buckle down (including sacrificing her love of arts and music) and not make the same mistake her mother did. Meanwhile, Bart publicly humiliates Nelson and becomes the school's new bully.
"How Munched is That Birdie in the Window?" (NABF02)
Bart nurses an injured pigeon back to health, but when Santa's Little Helper eats the bird, Bart must decide whether to forgive his dog or give him away once and for all. This epiosode guest stars Danica Patrick and Rachel Weisz.
In this four-part Christmas episode, Bart gets even with Santa Claus, Lisa dreams of an Inglourious Basterds-style Christmas, Marge receives a night time visit from the most powerful force in the universe who teaches her the true meaning of Christmas, and The Simpsons appear as puppets with pop singer Katy Perry. This episode also guest stars Martha Stewart.
After Bart discovers a boy with a similar scar on his arm, Marge reveals that she was a part of a group called "The Cool Moms," who used to set up playdates with their children and the two decide to reunite with their old friends.
Moe Szyslak and Waylon Smithers turn Moe's tavern into an ultra-trendy gay bar after Smithers is rejected from Mr. Burns's will and Moe's business is (once again) in a slump. Meanwhile, Principal Skinner tries to date the substitute music teacher and sets her daughter up with Bart. This episode guest Stars Alyson Hannigan, Kristen Wiig and Scott Thompson.
Homer tries to be a better father by using a 1980s sitcom as his guide, but things go wrong when Homer advises Bart to earn his own money for a dirtbike and Bart does just that -- by selling nuclear secrets to the Chinese government. This episode guest stars Michael Paul Chan, James Lipton, Garry Marshall, and David Mamet.
Moe hires Homer to be his wingman so he can score a date, but Homer ends up being the babe magnet. Meanwhile, Marge is shocked to find that her hairdresser has been dyeing her hair blue all these years and decides to go gray for a new, mature look.
Bart and Homer revisit their web series "Angry Dad" (from season 13's "I Am Furious Yellow") and turn it into an animated short that quickly gains an Oscar nomination, but Bart doesn't want Homer to get all the glory, so he sends his father away when the Simpsons go (back) to Hollywood.
Lisa discovers a rare desert plant that turns aggressive animals docile, while a pharmaceutical company wants to buy it off her to create a new drug. This episode guest stars Werner Herzog and Kevin Michael Richardson.
1970s stoner comedians Tommy Chong and Cheech Marin decide to break up after each of them get a new comedy partner -- Homer pairs up with Cheech to become "Cheech and Chunk" while Principal Skinner joins Chong to become "Teach and Chong." Meanwhile, Marge stages an intervention for The Crazy Cat Lady after noticing that she's hoarding animals -- which turns Marge into a hoarder herself.
Homer is sent to parenting therapy after tickling Bart until he wets his pants during a football game, but when the therapist is shocked to hear that Homer regularly physically abuses Bart, he puts Homer through shock treatment by having Kareem Abdul-Jabbar strangle him to make Homer feel as weak and helpless as Bart. This episode also guest stars Paul Rudd and Kevin Michael Richardson.
Lisa becomes friends with an old, widower magician, who gives her insight in performing one of Houdiniís greatest tricks. This episode guest stars Martin Landau, Jack McBrayer, Ricky Jay, Penn & Teller and David Copperfield.
After Lisa breaks Milhouse's heart yet again, he hooks up with a fifth-grader named Taffy, only to force Lisa to face up to how she really feels about him. Meanwhile, Homer becomes a hairdresser after fixing Patty's hair, but finds that dealing with gossipy, female clients all day is tedious and depressing. This episode guest stars Kristen Schaal as Taffy.
While trying to get Maggie out of Homer's locked car, the family discovers that they have been hoarding keys for years, setting up three interconnected adventures: Homer finds a key that operates the Duff Blimp, Marge finds a key that operates an antique toy that makes farting noises, and Lisa finds a key that leads her to a secret classroom in Springfield Elementary.
Ned Flanders begins dating Mrs. Krabappel after saving her from a prank gone bad -- until Flanders realizes that Mrs. Krabappel has left a trail of tears behind her from the men she dated before (including Aerosmith drummer, Joey Kramer). This episode also guest stars Ken Burns.