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This Little Wiggy - S9-E18

Continuity mistake: When Bart and Ralph twist the key into the armed switch, the armed sticker is red and the off sticker is yellow. Then, during the press conference, the stickers switch colors. Then, when Mayor Quimby sits in the electric chair, they switch back.

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Mr. Plow - S4-E9

Revealing mistake: When Lynda Ronstat is talking about making a spanish version of Barney's Plow King theme, Barney says "Yeah you do that" and when he does, we see the back of his jacket and the words Plow King are backwards. (00:17:20)

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Dude, Where's My Ranch? - S14-E18

Audio problem: When Bart gets the beavers to knock down the tree so that Clara can walk across, she gets onto it and starts walking gently. But when she walks gently, it sounds like she's walking quickly across the trunk.

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Kill the Alligator and Run - S11-E19

Deliberate mistake: When Marge is sweet talking the sheriff, Bart unlocks all but Homer's foot chains, but when they're running for the gate, Marge, Bart, and Lisa's shackles can be seen.

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Last Exit to Springfield - S4-E17

Continuity mistake: When the dentist shows Ralph the Big Book of British Smiles, he first shows him a picture of Sherlock Holmes with horrid teeth and all of his teeth are there. When Ralph starts getting terrified of it, it shows the same picture, but this time one of his teeth on the bottom right hand corner of his mouth is missing.

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