Other: In the scene where the angry mob is attacking the Simpsons in the tree house, Grandpa Simpson is shown aiming a double-barrel shotgun, which he then pumps to ready it for firing. There's no such thing as a double-barrel pump-action shotgun.

Continuity: When Russ Cargill appears on the big screen to explain the dome to Springfield, Moe is standing next to Homer and Lisa. A few shots later, Moe is standing next to Lenny and Carl, with different people around him.

Continuity: When Bart is proving he is sober, Homer is pumping petrol and eating a hotdog. The camera cuts and Homer is eating a hotdog but not pumping petrol like he was a second before.

Continuity: There is no circular window on the church from the outside but on the inside there is.

Continuity: When Marge runs back to the kitchen to retrieve the wedding video, the house is ablaze. In the next shot, when the mob is carrying the car away, there are no flames visible in the house.

Continuity: When Homer drives to the lake to dump the pig crap silo, there are hundreds of 'No Dumping' signs along the way, but on the way back, all the signs are gone, including the ones Homer missed.

Continuity: When circuling the dome on the bike, it leaves tyre marks. The camera cuts to Bart and the marks have gone.

Continuity: When Homer returns from Eski-Moe's to find Marge and the kids gone, he drops a bouquet of flowers on the bed. In the next shot, the flowers have disappeared, as has the pattern on the bed's quilt.

Continuity: In the cinema, when Homer tells everyone how boring this is, behind Bart, Lisa, Maggie and Marge sits Otto, Kirk van Houten and Barny, but in the next scene behind them sits Otto, Jasper, Kirk van Houten and Moleman.

Continuity: When the mob is charging toward the Simpson's house, we see Nelson in his regular clothes. When he shoots the arrow at the Simpson's, he is wearing a Springfield T-shirt.

Continuity: When jumping the gorge, the position of Homer and Bart changes depending on the angle.

Continuity: In the motel room, the poster of Alaska is not reflected in the mirror behind Marge. You can only see the little lamps next to the bed.

Continuity: The Simpsons leave the dome with nothing. However when Marge, Bart and Lisa are in the EPA van, Lisa has now got her sax.

Continuity: The "Duff Beer" blimp disappears from the sky while "Green Day" are performing.

Continuity: At one point during Grandpa's outburst in church, Marge is shown standing up. In the next shot, she is suddenly sitting down.

Continuity: When Marge is reconstructing Grampa's prophecy with magnets on the fridge, she moves the magnet saying" eyes" up a few inches to complete a sentence. When the shot changes to a wider angle, the magnet is back where it was before she moved it.

Continuity: The arrow that Nelson fires into Homer's head changes place between shots. It goes from on top to the side.

Continuity: Milhouse is seen when Lisa is looking for Colin and a few frames later he is in the middle of the town with no time to move there.

Continuity: In front of Krusty Burger, when Lou carries a naked Bart to the sign post, the post is embedded directly in the concrete walkway slab, just beside the left corner of the patch of grass. Once Bart is cuffed, the sign post has actually moved down about 4 feet, and is also now embedded directly in the grass at the right corner.

Continuity: When Homer kicks over the bomb, Comic Book Guy is seen seen behind him, with Carl, Cletus, and Krusty. In the next shot, Comic Book Guy is gone (appearing a few shots later at his comic book shop), and Barney is there instead.