Nikolai

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.

Nikolai

Thirty Minutes Over Tokyo - S10-E23

Continuity mistake: When Database is at The Java Server, he is using a teal computer, but when Snake comes in, he is using an orange computer, then he is using a teal computer again.

Nikolai

Lisa Gets an A - S10-E7

Revealing mistake: Two kids in the middle of the class do not have a test. However, they are shown writing on their desk as if they had a test paper.

Nikolai

There's No Disgrace Like Home - S1-E4

Revealing mistake: When the Simpsons are eating at the dinner table, Marge's necklace keeps flashing white.

Nikolai

Homer's Night Out - S1-E10

Revealing mistake: When Bart makes a copy of his photo for Lewis, footage of Milhouse inserting a coin into the copy machine is used. You can see Milhouse's pink shirt sleeve instead of Bart's orange shirt sleeve. This same shot is again reused a third time seconds later. (00:09:55)

Nikolai

The Telltale Head - S1-E8

Continuity mistake: During the theater scene, the man in the back with the moustache and green jacket watching the Space Mutants movie changes from having yellow skin to brown skin after Bart blows a raspberry. (00:09:30)

Nikolai

Krusty Gets Busted - S1-E12

Revealing mistake: When Homer enters the Kwik-E-Mart, the automatic door doesn't fully open, and Homer's left arm goes right through it. (00:03:40)

Nikolai

The Telltale Head - S1-E8

Revealing mistake: The blonde woman's midriff (from the Space Mutants movie) flashes pink for a frame.

Nikolai

The Telltale Head - S1-E8

Continuity mistake: When Bart returns home while Lisa is watching Krusty, the door opens without Bart even touching it. (00:22:00)

Nikolai