After Homer accidentally pollutes the town's water supply, Springfield is encased in a gigantic dome by the EPA and the Simpsons family are declared fugitives.
Homer adopts a pig who's run away from Krusty Burger after Krusty tried to have him slaughtered, naming the pig "Spider Pig." At the same time, the lake is protected after the audience sink the barge Green Day are on with garbage after they mention the environment. Meanwhile, Spider Pig's waste has filled up a silo in just 2 days, apparently with Homer's help. Homer can't get to the dump quickly so dumps the silo in the lake, polluting it. Russ Cargill, the villainous boss of the EPA, gives Arnold Schwarzenegger 5 options, forcing him to choose 4 (which is, unfortunately, to destroy Springfield) and putting a dome over Springfield to prevent evacuation. Homer, however, has escaped, along with his family. Can he stop the evil Cargill from annihilating his home town, and his family, who have been forced to return to Springfield?
Written by movieguy3
Among the list of foreign language signs the one in Korean translates to "Learn English with a Texas accent", and the one in Russian says "Learn English or leave".
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Goofs
Continuity:
In the scene of Bart's Avalanche, when Homer is buried the second time and he comes out, his hair is ruffled, when the shot changes to Bart and Lisa, his hair is back to normal, this happens a couple of times.
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Quotes
[first lines]
Scratchy:
[having just landed on the Moon]
We come in peace for cats and mice everywhere.
[Itchy impales and beats Scratchy with flag pole]
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Crazy Credits
All the main voice actors are credited with pictures of their characters. See more »