The Simpsons (1989)

Black Widower - S3-E21

Continuity mistake: During the wedding, look at the man with the blue hair carrying the tray with hors d' oeuvres that Homer is eating. When Homer says "Hey wiener boy. Where do you think you're going?" the man's collar changes from white to black instantly.

Simpson and Delilah - S2-E2

Revealing mistake: When talking to the doctor about using his health insurance, Homer's hairline above his ear vanishes in a shot then reappears.

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

Revealing mistake: When Homer brings Santa's Little Helper home, a single frame of Maggie falling off Marge's lap is misplaced.

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

Continuity mistake: When Mr. Burns is drinking on his desk, a frame is misplaced. His shot glass, for a split-second, moves from its original position, to the edge of the table, and back.

Bart the Daredevil - S2-E8

Audio problem: At the gorge, Nelson says, "Where is he? I thought he said noon!" But Milhouse's mouth is also accidentally lip synced to Nelson's dialogue.

Mayored to the Mob - S10-E9

Continuity mistake: A huge fight begins in front of Mark Hamill's stage. Homer, Quimby, Hamill, Bart and Lisa escape the fight through an emergency exit right behind the people fighting. But in a shot of the five running out, the people fighting inside have disappeared.

Bart Gets a Z - S21-E2

Continuity mistake: The size of the smiley face on Krabappel's mug keeps changing between shots. (00:04:50)

The Bob Next Door - S21-E22

Plot hole: Warren's (as Bob) face falls off and tries to hold it with his hand. Yet when he appears in the next scene, his face is totally sealed with nothing to seal with. (00:16:25 - 00:17:55)

The Bob Next Door - S21-E22

Continuity mistake: Bob duct tapes Bart's mouth before telling him his story, but the duct tape disappears when the story finishes. (00:12:30 - 00:14:10)

Once Upon a Time in Springfield - S21-E10

Continuity mistake: The merchandise Krusty asks the kids to hand back doesn't appear in the kids' hands until the merchandise is taken off them. (00:01:55)

Brother From Another Series - S8-E16

Continuity mistake: Sideshow Bob's seat belt is on in one shot but gone in the next when he has been released from prison.

Das Bus - S9-E14

Continuity mistake: Bart, Lisa and Milhouse run away from the others and are stopped by a cliff. Milhouse then grabs onto a vine which was never there in previous shots. (00:19:00)

Das Bus - S9-E14

Continuity mistake: At the trial, Milhouse moves over to Lisa and Bart is in the middle of them. In the next shot, Bart has disappeared. (00:15:25)

Das Bus - S9-E14

Continuity mistake: Everyone discovers Milhouse ate the food so they walk up to him. The shot cuts and they are further away than they were in the previous shot. (00:13:50)

Das Bus - S9-E14

Continuity mistake: As soon as the fish bites Bart's butt and causes a rip in his shorts, the rip disappears almost instantly. (00:12:40)

Das Bus - S9-E14

Continuity mistake: The part of the bus that got a hole in causing it to sink changes position when Bart goes to get the cooler later. (00:07:10 - 00:12:20)

Das Bus - S9-E14

Continuity mistake: A fire is started when Milhouse's glasses are used by Nelson. But when Nelson hands Milhouse back the glasses in the next shot, the fire has disappeared. (00:11:40)

Das Bus - S9-E14

Continuity mistake: There are 10 kids stuck on the island. But after the kids have washed up on the island and it cuts to the wide shot and it shows them on the beach, there are only 6 kids. (00:07:20)

Das Bus - S9-E14

Continuity mistake: When the kids wash up on the island, Lisa, Wendell, Martin, Lewis and Sherri are on land and Bart, Milhouse, Ralph, Nelson and Terri are still in the water. In the next shot, Bart, Milhouse, Ralph, Nelson and Terri are on land with the others. (00:07:15)

Das Bus - S9-E14

Continuity mistake: In the shot before Nelson says "Hey, Simpson. Race you", Ralph is seen sitting on the row in front of Martin. But when Ralph says "Go, banana" he is suddenly sitting two rows in front of Martin. (00:05:25)