The Simpsons
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Bart Gets An F - S2-E1

Revealing mistake: When there is a zoom in of the house just before Bart gets up late, it has the old arch-shaped windows, but in the rest of the episode it has the normal windows. It's obviously a screen from Season 1. (00:06:00)

OL1V3R666
4

Large Marge - S14-E4

Factual error: In Luigi's, the lobsters in the tank are bright red. They are actually quite dark brown until they are boiled when they become red/pink.

David Mercier
5
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The Simpsons Christmas Special: Simpsons Roasting on an Open Fire - S1-E1

Continuity mistake: During the family's breakfast, in most shots Marge sits right beside Maggie's highchair, but in certain close-ups they are quite a few feet away from one another. (00:05:25)

Super Grover Premium member
5

Two Cars in Every Garage and Three Eyes on Every Fish - S2-E4

Continuity mistake: The shot glass that Burns places on his desk disappears for several frames before reappearing. (00:05:45)

5

Tree House of Horror XII - S13-E1

Audio problem: In Reaper Madness; the scene where Homer destroys the Grim Reaper with a bowling ball, Bart is pinned on the wall by the Reaper's scythe. The scythe disappears and Bart says "Cool!" but his mouth just opens up and doesn't match the word.

5
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Lisa the Vegetarian - S7-E5

Continuity mistake: When we first see Homer feeding the can to the goat the background shows a wooden coop. In the next shot, a purple tree stump appears there too.

5

The Great Louse Detective - S14-E6

Continuity mistake: When Homer and Sideshow Bob are chasing the mechanic on stilts, the mechanic tries to get away, and his cape falls off while he is being chased. In the next shot, we see a close-up of the mechanic, and you can see his red cape is back on again. Then in the next shot, we see Homer and Bob chasing him, and his cape is off.

5

Barting Over - S14-E11

Continuity mistake: When Homer shows his "incriminating photos," you can see that in them, he is bald. We know from several previous episodes that Homer had hair when Bart was a baby. He even has a bit of hair when Lisa is born.

David Mercier
5
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Flaming Moe's - S3-E10

Continuity mistake: At the end, the barriers outside the tavern change position. (00:21:00)

Yoshi
5

Beyond Blunderdome - S11-E1

Revealing mistake: When Homer is giving Marge, Lisa and Bart money, Homer puts his hand on Bart's shoulder and whispers 'Mel's movie really stinks'. When he lets go of Bart to say this, he leaves his fingers on Bart's shoulder, but he still has fingers on his hand.

5

Bart the Mother - S10-E3

Continuity mistake: The bible that Reverend Lovejoy returns at the library is bigger in the first shot.

Dr Wilson
5

Bart After Dark - S8-E5

Continuity mistake: At The Town meeting Mayor Quimby's tan disappears in the middle of the scene.

5

Burns Verkaufen der Kraftwerk - S3-E11

Continuity mistake: In the bar, before Bart stomps on Mr. Burns' foot, his back is toward Smithers, but in the next shot, his back is turned toward everyone else. (00:19:15)

Yoshi
5

Moaning Lisa - S1-E6

Continuity mistake: When Homer says "I can't concentrate with that infernal racket", the shot goes up onto Lisa's room. From the outside, there is no window frame on the window. But from the inside, there is one going right through the middle.

5

Margical History Tour - S15-E11

Plot hole: During the Mozart skit, Lisa puts a sleeping tonic in the emperor's wine, but when she drank it she fell asleep also. How could that be if she only poisoned one glass of wine and it was the emperor's?

Matthew Gem Premium member
5

The Parent Rap - S13-E2

Continuity mistake: When Judge Harm is yelling at Marge and Homer after they have cut the rope, Marge is wearing lip gloss, and between two shots, it disappears.

5

Mr. Spritz Goes to Washington - S14-E14

Audio problem: At the end of the episode, when the guy who helped the Simpsons pass the bill says, "I just passed a bill in three hours. Quit complaining," his mouth movements don't match the words.

5

Mountain of Madness - S8-E12

Continuity mistake: When Mr Burns and Homer first enter the cabin, you can see the door opens with a door knob which is on the right hand side (looking from the outside). Later, after the avalanche, the door seems to open a different way, the knob has been replaced by a handle and it's on the other side.

David Mercier
5

Bart the Fink - S7-E15

Continuity mistake: Bart flicks through his chequebook in the car and finishes on The Front page of it having gone through all the cheques. When the shot changes he is holding it open.

David Mercier
5

Much Apu About Nothing - S7-E23

Continuity mistake: When the mob come to Quimby's office for the first time, the items on his desk change colour and position.

5

The Simpsons Christmas Special: Simpsons Roasting on an Open Fire - S1-E1

Homer: [buying a chewtoy for Maggie.] It says it's for dogs, but she can't read.

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Trivia: Maggie scans as $847.63 in the supermarket at the beginning (not NRA4EVER, as Troy Maclure asserts in 3F31 "The Simpsons 138th Episode Spectacular), the price it costs to feed and care for the average American baby every month.

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Tree House of Horror V - S6-E6

Question: Homer travels back in time and causes changes by what he does in the past, like stepping on a bug. I once saw a movie with the same basic plot: some people travel back in time and are told to be careful not to disturb anything, but when they return to their time everything has changed. In the end they discover it was because they stepped on a butterfly. Does anyone know the name of this movie?

Answer: I'm not sure if this is the one you're thinking of, but an episode of "Ray Bradbury Theatre," called "A Sound of Thunder," dealt with a similar matter: a group of hunters travel back in time to hunt dinosaurs, only to find things have changed when they get back because someone stepped on a butterfly.

Xofer
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