Continuity mistake: During Bart's stand-up comedy routine, Dr. Nick is seen wearing his usual white lab coat, but in the very next shot of the audience laughing, he is not wearing a coat.
Much Apu About Nothing - S7-E23
Continuity mistake: During the party for Apu, Dr. Nick is first seen not wearing a coat, then he has his usual white coat, then he has a brown coat, and then the white coat again.
Continuity mistake: In the overhead shot of Patty smoking, she is sitting on a greenish-gold car, the car then turns blue in the next shot.
Continuity mistake: When Homer gets up to make Mr. Burns' breakfast, Marge's nightgown is yellow, making her look naked, but in the next shot, her gown is purple.
Continuity mistake: At the funeral, while everyone is clapping for Bob Newhart, Mayor Quimby is seen with brown skin.
Continuity mistake: After Moe yells at Ralph, there's a woman in the background staring at Moe with an angry look on her face. She turns her head away from him after some seconds, but in the very next shot, she is looking at Moe with the same expression on her face.
Continuity mistake: When Milhouse snitches on Bart, Martin has grey hair and a black suit. In the very next shot he has his ordinary hair and is wearing a brown suit.
Continuity mistake: Jasper's beard is missing when everyone is singing "In-A-Gadda-Da-Vida" at church.
Springfield Connection - S6-E23
Continuity mistake: While the Simpsons are eating breakfast, Lisa is eating what seems to be cereal from a bowl, but when she asks Marge if she needs to take a bullet for the mayor, she now has a plate in front of her with eggs and some other food.
Springfield Connection - S6-E23
Continuity mistake: The clothing of the women at the hair salon (Maude, Agnes, and Mrs. Krabappel) keeps changing color throughout the entire scene.
Lisa vs. Malibu Stacy - S5-E14
Continuity mistake: When the Simpsons are leaving the house to go to the mall. The aerial shot shows that they are leaving in Marge's red station wagon, but the very next shot of them in the car shows that they are in Homer's pink sedan. The shot of the station wagon leaving is probably a re-used shot from a previous episode.
Lisa vs. Malibu Stacy - S5-E14
Continuity mistake: When the Simpsons are about to leave the house to go to the mall, they're all wearing jackets, but when they're in the car just a few seconds later, none of them have their jackets on.
Four Regrettings and a Funeral - S25-E3
Continuity mistake: At church, while Marge is reminiscing about being pregnant with Bart, Kirk Van Houten is seen with grey hair and eyebrows. He has his ordinary blue hair and eyebrows in all other shots of him.
A Test Before Trying - S24-E10
Continuity mistake: During the electricity rate hike announcement, Chief Wiggum is seen in the crowd incorrectly drawn with brown skin and black hair.
Blood Feud - S2-E22
Continuity mistake: When Mr. Burns gets up after the blood transfusion, Dr. Hibbert is incorrectly colored yellow instead of brown.
The D'oh-cial Network - S23-E11
Continuity mistake: At one point in court while everyone is laughing, Patty's hair is colored wrong. Her hair is a similar shade of color as Rod and Todd (who are sitting next to her) rather than her own bluish grey hair.
Kamp Krusty - S4-E1
Continuity mistake: When Lisa is reading her report card, the writing suddenly appears on the back of the paper, even though she didn't flip the card. (00:04:10)
Continuity mistake: The waiter at The Gilded Truffle who takes the chair away turns into a completely different waiter when the angle changes.
Marge vs. the Monorail - S4-E12
Continuity mistake: When Quimby states to Lyle that Springfield is twice as smart as Shelbyville, Quimby lowers his gavel at the end of the line. In a sudden close-up of Quimby, his gavel is raised again. (00:07:05)
Tree House of Horror X - S11-E4
Continuity mistake: In "I Know What You Diddly-Iddly Did", Marge's necklace keeps changing from red to white when the Simpsons are at church, and when they go back home.
