Nikolai

Homer the Heretic - S4-E3

Revealing mistake: When Lisa says "Truly this was an act of God", her ear disappears and reappears several times. (00:19:30)

Nikolai

E-I-E-I-(Annoyed Grunt) - S11-E5

Revealing mistake: After Lisa says "For a product that's evil and deadly" while standing in front of the tomacco stand, there's a duplicate Lisa behind her that stands still while she moves, giving Lisa the appearance of having two heads. It looks like the animators made a mistake while trying to animate Lisa.

Nikolai

The War of the Simpsons - S2-E20

Revealing mistake: When Ned says "Crème de cassis" while describing what was in the drink he made. There are several animation errors in this shot. His head is disconnected from his body, and his nose disappears. Also, a part of his face is missing between his fingers while he does the 'OK' hand gesture.

Nikolai

Politically Inept, with Homer Simpson - S23-E10

Revealing mistake: Right before Homer is patted down at the airport, his facial hair briefly flickers yellow.

Nikolai

Politically Inept, with Homer Simpson - S23-E10

Revealing mistake: While Homer catches his underwear with his tongue after the Simpsons' clothes burst out of the suitcases, Homer's tongue briefly passes through his underwear.

Nikolai

Moe Letter Blues - S21-E21

Revealing mistake: When Homer is riding Barney like a bull at Moe's, there are duplicates of Sam and Larry (the barflies) in the same shot.

Nikolai

Dangerous Curves - S20-E5

Revealing mistake: When Alberto says "If you had completed your seduction of me, I never would have met Sylvia," his shirt collar briefly turns into the same color as his blazer.

Nikolai

Little Girl in the Big Ten - S13-E20

Revealing mistake: When Bart says "I don't feel so good" after being bitten by a mosquito, his lower body under the table is not visible.

Nikolai

Lisa the Tree Hugger - S12-E4

Revealing mistake: When Lisa wraps herself in Marge's arms right before she falls asleep, the inside of her mouth turns yellow.

Nikolai

Homer to the Max - S10-E13

Revealing mistake: There are two Ruth Powers in the same shot, when the people are crowding on Homer at the mall.

Nikolai

Wild Barts Can't Be Broken - S10-E11

Revealing mistake: Lenny's lower torso disappears for two frames when he, Carl, Homer and Barney are singing "We Are The Champions/We Will Rock You."

Nikolai

The City of New York vs. Homer Simpson - S9-E1

Revealing mistake: Homer drives his car through the man at the picnic.

Nikolai

The Old Man and the Lisa - S8-E21

Revealing mistake: At the hospital, while Lisa is explaining how much 10% of $120 million is to Homer, Dr. Hibbert's hand is yellow.

Nikolai

Burns Baby Burns - S8-E4

Revealing mistake: While Larry and Homer are talking about Mr. Burns, Larry's drink flickers light pink twice.

Nikolai

22 Short Films About Springfield - S7-E21

Revealing mistake: A black line briefly appears on Apu's forehead while he's tossing the tofu dog around.

Nikolai

Team Homer - S7-E12

Revealing mistake: When the children are running down the hallway, the animation keeps repeating. Duplicates of the same children are running several times.

Nikolai

Ned 'N' Edna's Blend - S23-E21

Revealing mistake: When Marge is talking to Helen Lovejoy about Canapés at the party, Marge's mouth disappears for a single frame.

Nikolai

Springfield Connection - S6-E23

Revealing mistake: Homer's hand briefly turns transparent when he puts it on Marge's shoulder after he tells her to rip up the ticket.

Nikolai

Round Springfield - S6-E22

Revealing mistake: Mr. Burns' body is not seen through the window of his car when he tells Smithers to drive.

Nikolai

Homer vs. Patty and Selma - S6-E17

Revealing mistake: While the Simpsons are having dinner, the top portion of the chair Homer is sitting on disappears when he tilts the chair back.

Nikolai