Episode - 9F22\\
First Aired - 10/7/1993

Bart is plagued with threatening letters written in blood (except for one written in black by Homer that reads, "I'LL KILL YOU SCUM") and by the recently-paroled Sideshow Bob. To keep Bart from getting killed, The Simpsons go into witness protection and move away to Terror Lake.

This was the last episode written by the original writing team (e.g. Sam Simon, David Stern, Jeff Martin, Jon Vitti, Jay Kogen and Wallace Wolodarsky) before David Mirkin's new hires were brought aboard, so they wanted to go all out and leave a good last impression. To many fans, they succeeded.
* ActuallyPrettyFunny:
** Chief Wiggum resented Bob for calling him "Chief Piggum", but when the others laughed at it, he rolled along with them.
** Bart putting the "Wide Load" tattoo on Homer's butt earned the laughs of ''everyone'' in the room (except Homer).
* AdaptationExpansion: ''Theatre/MrBurnsAPostElectricPlay'' is inspired by this episode.
* ArtisticLicenseBiology: The electric eels that prevent Bart from jumping off the houseboat to escape from Bob have flicking forked tongues as if they are snakes.
* BaitAndSwitch[=/=]RuleOfThree: Three times in the first act, before it's known that Sideshow Bob wrote Bart the death threats, Bart worries that three people around him are the culprit based on the first half of the sentence they say:
--> '''Marge''': (menacingly, holding scissors) Bart, I'm going to ''get'' you...... some ice cream at the store, since I'm saving so much money on Diet Cola!\\
'''Ned''': (menacingly, with [[Franchise/ANightmareOnElmStreet Freddy Krueger]]-style blade hand) Say your prayers, Simpson...... because the schools can't force you like they should!\\
'''Edna''': (menacingly) You're going to be my ''murder victim'', Bart!..... in our school production of ''UsefulNotes/LizzieBorden'', starring Martin Prince as Lizzie.\\
'''Martin''': (in drag, brandishing axe) Forty whacks with a wet noodle, Bart!
* BilingualBonus: Sideshow Bob tries to pass off the tattoo on his chest (DIE BART, DIE) as German for "The Bart, The". You'd assume Bob was lying in order to deceive his parole board, but Die does, indeed, mean "the" in German (although it's more of a female term rather than a male term).
* BitingTheHandHumor: Lisa's line, "The FOX network has sunk to a new low" after watching ''Up Late With [=McBain=]''.
* BoringYetPractical: When Bob faints from blood loss, Snake suggests that he use a pen instead.
* {{Bowdlerise}}: The episode was banned in Germany not only due to the large amount of violence (mostly aimed at a child [i.e., Bart]), but also because of the opening joke where Bart and Lisa watch a talk show called "Up Late with [=McBain=]", featuring a show announcer known as Obergruppenfuehrer (the SS equivalent rank of lieutenant-general) Wolfcastle, dressed in full SS uniform, complete with swastika armband. In Germany ([[OldShame for obvious reasons]]), depicting Nazism and swastikas outside of historical context is considered highly illegal (which is why the video games ''VideoGame/CastleWolfenstein'' and ''VideoGame/DoomII'' are banned in Germany).
* BrickJoke:
** Grampa is left behind without his pills while the Simpsons leave town. When they return home, [[GenderBender he has apparently turned into a woman without his pills]].
** Somehow, Bart gets a Playbill with Sideshow Bob on the cover during his performance of ''HMS Pinafore''. On a related note, the throwaway line regarding the Creator/GilbertAndSullivan recordings.
* TheChewToy: Bob takes a hell of a lot of slapstick abuse in this episode from losing blood, hitting speedbumps, driving through cacti, stepping on rakes, getting crushed by an entire parade including ''elephants''...and it is ''hilarious''.
* ChekhovsGun: Bart's strategy for distracting Bob is foreshadowed by the family listening to the entire works of Creator/GilbertAndSullivan on the way to Terror Lake.
* ComebackTomorrow:
--> '''Bart''': ''You'' wrote me those letters.\\
'''Marge''': You awful man! Stay away from my son!\\
'''Sideshow Bob''': Oh, I'll stay away from your son, all right. Stay away... forever.\\
'''Homer''': Oh no!\\
'''Sideshow Bob''': Wait a minute, that's no good. (tries to think of a different line but can't) Oh!\\
(Bob gets up and leaves, but after a few seconds, rushes back)\\
'''Sideshow Bob''': Wait, I've got a good one now. Marge, say "Stay away from my son" again.\\
'''Marge''': NO!\\
(Bob grumbles angrily)
* ComicallyMissingThePoint: After almost 5 hours of being stomped on the foot, being referred to as Homer Thompson, the new name the witness protection agents have chosen for the Simpsons as they elude Sideshow Bob to no avail, all Homer can say to one of the agents is, "I think he's talking to you."
* CouldntFindAPen: Sideshow Bob writes ''everything'' in blood (threatening letters to Bart, to-do lists, letters to ''Reader's Digest'') while he's in prison. Lampshaded by Snake when Bob gets woozy from his anemia:
-->'''Snake:''' Use a ''pen'', Sideshow Bob!
* CrosscastRole: Martin Prince as UsefulNotes/LizzieBorden for a school play. Bonus points in that Martin is voiced by a woman.
* CrushParade: "No, not the elephants!"
* CurseOfTheAncients: When the police show up right as he is about to kill Bart, Bob shouts in frustration, “By Lucifer’s beard!” The officers are taken aback for a second, but then move on.
* DramaticThunder: Occurs when the scene cuts over to Bob in prison.
* FalselyReformedVillain: Sideshow Bob pretends to go straight so he can get paroled out of prison and kill Bart.
* GenderBender: At the end of the episode, it's shown that Grampa apparently needs to take a type of medication to prevent this from happening to him.
* GettingCrapPastTheRadar: The police officers are wearing bathrobes when they arrest Sideshow Bob and admit that they were just at a [[DenOfIniquity brothel]].
* GilliganCut: The Simpsons tried to hire someone to drive Bob away from town. The guy sounded like he'd be tough enough for the job. Cut to him whining to Bob while pathetically asking him to leave town.
* GoKartingWithBowser: Bart joins Bob in singing "I Am the Captain of the Pinafore."
* GoshDangItToHeck:
-->'''Sideshow Bob:''' Bart Simpson? Ha! The spirited little scamp who twice foiled my evil schemes and sent me to this ''dank, urine soaked hellhole?''
-->'''Parole officer:''' Uh, we object to the term "urine-soaked hellhole" when you could have said "pee-pee-soaked heckhole".
-->'''Sideshow Bob:''' Cheerfully withdrawn.
* HockeyMaskAndChainsaw: Homer bursts into Bart's room wearing a hockey mask and brandishing a chainsaw, asking if Bart wants to see either. Currently provides the page image.
* HorribleJudgeOfCharacter: Sideshow Bob's parole board, who buy his explanation that his "DIE BART, DIE" tattoo is merely German for "The Bart, The".
-->"No one who speaks German can be an evil man!"
* HypocriticalHumor: Homer criticizing the guy (Sideshow Bob) smoking a cigar in front of his Family at the movies while he was smoking an ''even larger'' cigar.
* IDontLikeTheSoundOfThatPlace: The only options the Witness Relocation Program offers for the Simpsons to move to are Terror Lake, New Horrorfield, and Screamville.
-->'''Homer:''' Oooh, Ice Creamville!\\
'''Agent:''' No, ''Scream''ville.\\
''(Homer screams)''
* InfantImmortality: Bart plays this straight, but it is implied that Anya wasn't so lucky when Krull came into power.
* {{Leitmotif}}: Sideshow Bob gains one in this episode: Music/BernardHerrmann's ''Film/CapeFear'' title theme.
* LogoJoke: Midway through the episode, when the Simpsons get new identities, the opening plays again, this time introducing "The Thompsons" and gradually zooming in on their houseboat.
* MightAsWellNotBeInPrisonAtAll: Sideshow Bob sends Bart threatening letters AND makes parole while he's still incarcerated! Somebody should really up the security.
* MisplacedWildlife: Bart gets menaced by electric eels when he attempts to jump off the houseboat. Electric eels are indigenous to South America (which Springfield is probably not in).
* NoodleIncident: While trying to figure out who's sending Bart threatening notes, it turns out Bart's been making crank calls to Moe and actress Linda Lavin for years. In the latter's case, she did something so bad even Lisa felt she deserved Bart's pranks.
* OhCrap: Right when Bob hears the band marching towards him, his eyes widen and they start trampling him.
* OutOfCharacterMoment: It seems odd that Bob - who speaks out against lowbrow humor in other episodes - would find Jim Varney very funny, unless it's a GuiltyPleasure of his.
** It's highly likely that Bob wasn't genuinely laughing, but merely doing it to annoy/bait the Simpsons. See also his cigar smoking. Of course, the whole scene is a direct parody of the one in the movie ''Cape Fear'', so RuleOfFunny probably overrides established characterizations.
* OutsideRide: The family is moving to a new town to get away from Sideshow Bob. Unfortunately for them, Bob has used a harness to strap himself to the underside of their car. Unfortunately for ''Bob'', on the way his head smacks against speedbumps, Homer pours overly hot coffee over the side of the car, and the family decides to drive through a cactus patch for fun.
* OverlyLongGag: Bob vs. rakes, Round 1! It had to be shortened in syndication (excluding FXX) because of how long it was (it was approximately 30 seconds; the episode was running short and they needed padding).
** Homer not responding to his witness protection name (Homer Thompson) would also qualify.
* PajamaCladHero: Bart. When his family is kidnapped by Bob, and [[NeverSmileAtACrocodile alligators]] and [[PsychoElectricEel eels]] surround their houseboat, what does he do in the face of certain death? He asks Bob to sing the entire score of ''Theatre/HMSPinafore'' in an effort to stall for time long enough to get to Springfield and have the police arrest Bob and save the day. PajamaCladHero indeed!
* ParanoiaFuel: In-universe, the entire episode revolves around this. Bart receives at least a dozen threatening letters and is soon misreading people's innocuous words and cues. Justified, however, in that [[ProperlyParanoid he has a good reason to be on edge]].
* PsychoElectricEel: Electric eels menace Bart when he tried to jump off a houseboat to escape Sideshow Bob. This despite the fact that they were nowhere near South America at the time. Also, the electric eels for some reason have snake-like tongues.
* RakeTake: The first of ''many'' for Sideshow Bob.
* RealityEnsues:
** Sideshow Bob's (first) UndersideRide. That is all.
** Him passing out due to using his blood to write.
* RiddleForTheAges:
** Just how, when, and why ''did'' Bart put the "Wide Load" tattoo on Homer's butt?
** And what did Linda Lavin do to deserve getting prank-called by Bart?
* RuleOfFunny: The episode invokes this trope to a significant extent. It was the last hurrah for a number of the show's original writers who were leaving. They threw every wacky or random gag into the episode with the mentality of "What are they going to do? Fire us?" This resulted in one of the most highly regarded episodes of the show ever. Among other things, the episode features an elephant stepping on Bob's face and Bob putting on a full Music/GilbertAndSullivan opera (complete with costumes and a playbill) after being asked to do so on the spot.
* RunningGag: When Sideshow Bob finally climbs aboard the Simpsons' house-boat, the first thing he does is [[RakeTake step on another rake]]. [[FridgeLogic Makes you wonder what it's even doing there.]]
* SavageWolves: After the rest of the family packs up and leaves, Grandpa Simpson gets left behind at the Simpson house, knocking at the door and saying "Hello-o! Hello-o! You have my pills! Hello-o? I'm cold and there are wolves after me" ''(cue howling'').
* ScheherezadeGambit: When Bob has Bart cornered on the adrift houseboat and asks if he has any {{Last Request}}s, Bart plays on his ego, telling him he has such a lovely singing voice ("Guilty as charged!" exclaims Bob) and asks him to sing the entire score of ''Theatre/HMSPinafore'', Bob complies (mostly to prove he can do it, probably) oblivious to the fact that the boat is drifting towards Springfield as he does, and as he finishes, he's noticed by Chief Wiggum and a squad of armed police, who tell him to raise 'em.
* ShoutOut:
** Obviously, to the movie ''Film/CapeFear''.
** Bob stays at the [[Film/{{Psycho}} Bates Motel]].
** In addition to Bob's take on ''Theatre/HMSPinafore'', the Simpsons also listen to ''Theatre/TheMikado'' on their way to Terror Lake.
** The ''Itchy and Scratchy'' short parodies ''Film/{{Goldfinger}}'' (specifically, the [[DeathTrap laser slowly ascending to crotch level]])
** The [=McBain=] late night show is a reference to such desperate measures by Fox to have a late night show (hello, ''The ChevyChase Show''!)
** The last scene of the old man being infatuated by Grampa and the ensuing dialog is from ''Film/SomeLikeItHot''.
* SpecialGuest: Creator/KelseyGrammer as Sideshow Bob.
* {{Spoonerism}}: Near the end, when Bart says, "Take 'em away, boys!", Chief Wiggum responds with, "[[HeyThatsMyLine Hey, I'm the Chief here!]] Bake 'em away, toys!" The other officers are clueless, even Sideshow Bob is confused.
* SquirrelsInMyPants: When Chief Wiggum's attention is called to the fact it's illegal to send threatening letters, he notices it's also illegal to put squirrels down one's pants for gambling purposes. Chief Wiggum then tells the cops who are doing it to "knock it off".
* StabTheSalad: Happens to Bart several times as he worries about who might be out to get him. Homer even pulls this twice when they're in Terror Lake.
* TakeThat:
** The family first meets Bob while watching a movie called ''Ernest Goes Someplace Cheap'', a clear Take That towards movies with Jim Varney's IdiotHero character Ernest P. Worrell (of course, most consider those movies AcceptableTargets).
** Homer dreaming of being John Elway scoring the touchdown after being blown out in the Super Bowl, a Take That to Elway, who back then had the reputation of being a great quarterback, but one who chocked in the Super Bowl, being on the losing end of three.
* TemptingFate: "Surely there is no harm in laying in the middle of a public street." Cue a [[CrushParade parade]]... with elephants.
* TookALevelInJerkass: In his two previous appearances, Bob at least made the effort to appear like an honest, law-abiding citizen. This time around he's an outright CardCarryingVillain, who makes no secret of his wishes to dispose of Bart.
* UndersideRide: Sideshow Bob tries this in a parody of the 1991 ''Film/CapeFear'' scene. While he does get to his destination, it doesn't quite work out as the family drive through a lot of cacti and over a fair few speed bumps on the way there, not to mention Homer spilling his hot coffee under the car.
* WholePlotReference: The episode is a loving homage to...uh, ''Film/CapeFear''—both the original and the remake. It established the film's main theme as Sideshow Bob's {{leitmotif}}, and [[WeirdAlEffect it's fair to say that the music is now remembered more as Bob's theme than it is the film's]].
* WouldHurtAChild: The plot of the episode, natch. Also implied with General Krull towards Anya, as she was unable to finish her letter to Lisa.
* YouHaveToBelieveMe:
-->'''Bart:''' Mom, dad, I just saw Sideshow Bob and he tried to kill me!\\
'''Homer:''' Bart, don't interrupt!\\
'''Marge:''' Homer, this is serious!\\
'''Homer:''' ''(rolls his eyes)'' Oh, it is ''not''.