[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/thewho.gif]]
[[caption-width-right:350:"Look, Lisa! Daddy's in The Who!]]

Tensions in Springfield bubble when the town is divided into two area codes, eventually splitting it in two. When a dividing wall fails them, it's up to Homer to reunite everybody with a little help from Music/TheWho.

!!Tropes appearing in this episode
* AccidentalInnuendo: InUniverse. After Homer accidentally leads Olde Springfield to gold, Kent Brockman thanks him, saying "Thanks to you, we're all taking ''golden'' showers now." His crew are heard chuckling from offscreen while he asks what's so funny.
* AnimatedActors: Spoofed. Homer tries to ask the character in an educational film a question. Lisa tries to explain to him that he's not real, but he tells her to be quiet.
* ArsonMurderAndJaywalking: The angry, defiant Who songs Homer lists include "Won't Get Fooled Again," "My Generation" and "[[RefrainFromAssuming (Mama's Got A)]] Squeeze Box."
* ArtisticLicenceHistory: Parodied.
** Homer apparently followed The Who back when they were The Hillbilly Bugger boys (of course, this could just be Homer being Homer).
** Krusty tells Sideshow Mel about how he opened for The Who at Woodstock.
* BaitAndSwitch: Homer goes to get "liquid persuasion" for The Who to come to New Springfield, which is implied to be alcohol, but turns out to be chloroform. Then while sneaking into the hotel to find The Who, their security guard grabs Homer and Bart and leads along a hallways before throwing them through a pair of double-doors yelling "Here's your Who!!" While it looks like he's bouncing them out of the hotel, he's actually bringing them to their hotel room (in a humorously aggressive way).
* BodyHorror: Despite Homer only sticking his head into the doghouse, the Badger that attacks him somehow manages to ''tear off the flesh and muscle on his belly!''
* BrickJoke: The badger from the first act reappears at the very end, leading other badgers to attack Springfield.
* CallBack: The angel skeleton from "Lisa The Skeptic" is part of the recycled materials used for the dividing wall.
* CouldHaveAvoidedThisPlot: As Roger Daltrey mentions, the whole area code situation could have been fixed if everyone bought phones with speed dial.
* ComicallyMissingThePoint: Marge laments how the people in Olde Springfield are their neighbors and that they see each other every day. Homer's solution? Build a wall to block them from their sight. Later, Homer brings a bottle of chloroform with him when he tries to sneak into The Who's hotel room... and offers it to the security guard in exchange for him letting them in.
* DontExplainTheJoke: While listening to the radio, Homer hears the two [=DJs=] make a crack about Joan Collins being in two when a mattress on the freeway causes a traffic jam. He laughs and exclaims to himself "Joan Collins?? [[ReallyGetsAround That girl sleeps with everybody]]!!"
* DreadfulMusician: Homer tries to demonstrate how "Pac-Man Fever" "...plays itself" by grabbing Pete Townshend's guitar and strumming some random noises on it as Townshend and Roger Daltrey exchange glances.
* HypocriticalHumor: Homer addresses the town meeting by saying that he's not one to make trouble... with [[ItMakesSenseInContext dynamite strapped to his chest]].
* IResembleThatRemark
-->'''Kent Brockman''' (on TV reporting about New Springfield): "And while ''we'' speak in a well-educated manner, they tend to use lowbrow expressions like "Oh yeah?" and "C'mere a minute."
--> '''Homer''': Oh yeah?? They think they're better than us, huh? (to Bart) Bart, c'mere a minute!
--> '''Bart''': ''You'' c'mere a minute!
--> '''Homer''' (shaking his fist): Oh yeah??
* KentBrockmanNews: As seen on the above quote, Kent can't hide his disdain for New Springfield.
* NeverMyFault: After everything is back to normal, Homer tells Marge "[her] insane experiment is over" and [[BrickJoke chloroforms her]] just before she can bitch him out about it.
* NiceJobBreakingItHero: An act of vengeance against Olde Springfield ends up making it's rich citizens slightly richer when he drains their lake, revealing gold underneath. Later, he reduces New Springfield to a ghost town when his dividing wall cuts the city off from all of it's resources.
* PosthumousCollaboration: At the band's request, The Who's long-deceased drummer Keith Moon is animated with the rest of the then-surviving members during their concert.
* ProductPlacement: Parodied.
** The Who concert is staged at Springfield's "historic" Yahoo Search Engine Arena.[[note]]This could go one of two ways: either the arena ''was'' at one point a more historic venue which got bought out by Yahoo!, or it's not actually that historic.[[/note]]
** Humorously avoided when Bart's "novelty flying disk" gets stolen by the bullies.
** Roger Daltrey recommends that everyone in Springfield buy speed dial telephones at Radio Shack, though Pete Townshend seems to disapprove.
* ThePowerOfRock: An especially rockin' performance of "Won't Get Fooled Again" brings down the dividing wall.
* ReversePsychology: The school bullies steal Bart's Friz- er, novelty flying disk, then his pants, when he's on their turf. Bart tells them that his ''homework'' is as well and they immediately steal it... and do it.
* RuleAbidingRebel: The members of The Who, not wanting to lose their pool priveleges, are quite annoyed at Homer and Bart trashing their hotel room in the name of rock n' roll.
* ScrewThisImOutOfHere: The citizens of New Springfield quickly abandon it for Olde Springfield when Homer reveals that all of their hospitals, schools and food supplies have been cut off due to the wall. Soon it's just him, his family and the tumbleweed... ''until the tumbleweed crosses the wall too''.
* SeriousBusiness: Apparently, The Who's handshake agreement with their concert promotor is a sacred bond.
--> '''Roger, Pete and John''' (in unison): Sacred bond...!
* ShoutOut
** Todd's woodpecker, which Bart tries to feed to the badger, flies away while laughing like [[WesternAnimation/WoodyWoodpecker another, more well-known cartoon woodpecker]].
** There are, of course, many references to Music/TheWho as well: the "file photo" of Homer and his friends sitting on a stoop spoofs the band's cover of ''Meaty, Beaty, Big and Bouncy.''
** Homer standing up to speak at the town meeting is framed to resemble the Creator/NormanRockwell painting "Freedom Of Speech."
* SillyReasonForWar: Who would have thought that memorizing a new area code would cause the town to implode the way it does? The members of the Who, who eventually solve the problem by telling everyone to get speed-dial phones, seem rather disgusted and only agree to finish their show if the wall gets torn down.
* TakeThat: While "New" Springfield "...[sits] back and waits for an [=NLF=] franchise."
-->(A businessman approaches Homer, who's sitting in a lounge chair)\\
'''Businessman''': Excuse me, I couldn't help but overhear. I represent the St. Louis Cardinals and-"\\
'''Homer''': Keep walkin'.\\
(Businessman walks sadly away as Homer innocently whistles)
* UpToEleven: The highest notch on Pete Townshend's amplifier is simply labeled "WUH-OOHHH!"
* VisualPun: The grass in Olde Springfield is literally greener.
* WaxingLyrical: When the citizens of Olde Springfield hear "The Seeker" playing from across town, revealing that Homer has stolen their Who concert, Moe angrily quips [[Music/{{Tommy}} "That fat, dumb and bald guy sure plays some real hardball!"]]
* [[WhatHappenedToTheMouse What Happened To The Badger?]]: The badger in Santa's Little Helper's dog house is immediately forgotten about once the issue of the areas codes comes into play... [[SubvertedTrope only to reappear at the very end.]]
* YeOldeButcheredeEnglishe: The side of Springfield with the old 636 area code declare themselves Olde Springfield.