The Bob Next Door/References

Cultural references

 * The title is a reference to the song "" from .
 * Harry Potter: Sideshow Bob says that his plan to kill Bart will make it the greatest murder since Snape killed Dumbledore, which happened in the sixth book, . Sideshow Bob also is not insulting the book when he says, "It's a four-year-old book." He is actually correct. Harry Potter and the Half-Blood Prince was released in July 2005, four years and ten months before the episode aired. It would have been more correct for Bob to refer to it as a five-year-old book; however, when the script was written, it could have actually been closer to four years than five and the writers forgot to change it.
 * The song that Bart and Milhouse sing (when they try to bait "Walt" into revealing himself as Bob in disguise), using Japanese folding fans as the requisite props, is "" from the Gilbert & Sullivan operetta . When Sideshow Bob reveals himself to Bart in the car, he sings Behold the Lord High Executioner from the same operetta, quite apt given Bob's intentions. For this song, Bob pulls his own folding fan from the glove box.
 * The episode's plot is based on the movie . The movie's title is also punned in the episode "Faith Off".
 * The couch gag features Harold from the children's book .
 * The stuff the cops from New Jersey say after handcuffing Bob is a reference to.
 * The ending scene, where a cousin of Ned Flanders arrives and appears to be just like him (including a bit of similarity in appearance) is likely a reference to the TV series '', which dealt with two cousins who looked exactly alike.
 * One of the magazines Bart looks through in Walt's house is called "Not MAD Magazine," which is a reference to the popular '' magazine, even having the same kind of cover design.
 * Five Corners is a spoof of, the only point in the USA where four states meet.
 * Walt Warren drives a Toyota Prius

Trivia

 * Adding to the fun, mystery, and controversy regarding Springfield's state: The cops who arrest Sideshow Bob at The Five Corners seem to be from New Jersey, judging from their accents and cultural references, with one of them parodying the speech patterns and expressions of comedian Andrew Dice Clay.
 * Marge and Homer try to reassure Bart by naming people who sound like Sideshow Bob: Frasier Crane on Cheers, Frasier on Frasier, and Lt. Commander Tom Dodge on  -- all three of whom were played by Kelsey Grammer, who provides the voice of Sideshow Bob.
 * The episode reveals Chief Wiggum's age to be 43.
 * Bart's graffiti name El Barto appears on the prison wall that Walt (looking like Bob) climbs over when escaping from prison.
 * The rake joke which started in "Cape Feare" (then reappeared in "Day of the Jackanapes" and "The Italian Bob") reappears in this episode when Bob tries to kill Bart at Five Corners.
 * When Bart hears Bob as Walt say "Hello, Bart" again after asking him to repeat the phrase, a montage of the times that Sideshow Bob says that particular phrase was shown with the first three being from the episodes "The Great Louse Detective", "Sideshow Bob Roberts" and "Brother from Another Series". The "Hello Bart."s from Cape Feare and Day of the Jackanapes are the only ones not shown as the remaining two in the montage were made for the episode (the latter was actually referring to the acronym for the Bay Area Rapid Transit, "BART").
 * Walt Warren can actually be seen leaving the prison at the beginning of the episode when Quimby is announcing cutbacks.

Iceland-Related Trivia

 * The episode was aired during the.
 * The signs held by the Icelandic protestors are all very grammatically incorrect.
 * "Við vilja okkar pening!" - Should be "Við viljum peningana okkar!" which means "We want our money!"
 * "Neitun Homer!" - Directly translated it means "Denial Homer!"
 * "Segna upp nú!" - Segna is not a word, "segja" is, it could mean "Segjið upp núna!" which means "Quit your job now!"
 * Following the episode, an image of the protest in the Simpsons with a headline "Iceland in The Simpsons" appeared on the front page of "Fréttablaðið", Iceland's most widely-read newspaper. They also dedicated about half a page to The Simpsons. It should be noted that The Simpsons was not criticized in the newspaper and that The Simpsons are very popular in Iceland.
 * Iceland has been referenced twice before on The Simpsons, once Carl mentioned that he grew up in Iceland and in "Worst Episode Ever" there was a food stand in the Springfield Squidport named "What they eat in Iceland"
 * "Beowulf" is Old English.

Goofs

 * In the car, Bart's mouth is taped, but after Sideshow Bob's backstory. The mouth is untaped. Again, Bob retapes it and again in the next scene, it is untaped.
 * When the real Walt Warren appears (with Sideshow Bob's face) and Marge and Homer catch him, Homer ties him up with Flanders' garden hose. Even though the water was running before, when Homer ties up Walt, there's no water stacking up in the taut hose, nor is there any water coming out.
 * When the waitress rips Walt's face from Sideshow Bob, Bob holds it in place with a belt. Walt does the same thing when Bob's face is ripped from him. Later in the episode, however, their faces stay in place in spite of the fact that they aren't using anything to hold them on.
 * At Five Corners, when Chief Wiggum explains how the Springfield cops searched for Sideshow Bob, Bob tosses Bart and Walt into different states. Moments later when a second state's police force arrives, Bart and Walt are in the same state again.
 * At the Party when Everyone is Trying out the Wifi Jessica Lovejoy can be seen next to the Reverend but she has Helen's colors.
 * Bob tells Bart that the term epitaph refers to your last words when in actuality it refers to the writing on your gravestone.
 * When Marge is talking to Lisa at the beginning of the episode, most of the words she is saying do not match her mouth's movements.
 * In the first shot of Bob/Walt's party, Jasper has Grampa's colors.

Continuity

 * Bart has flashbacks encounters of Sideshow Bob in previous episodes.
 * Bob's large feet also reveal his identity in "Krusty Gets Busted".