With 18 seasons behind them on TV, The Simpsons have moved from "what is wrong with America" to an American icon. The show is now the longest running sitcom in U.S. TV history with no end in sight. Now the adventures of everyone's favorite dysfunctional family have been transported to the big screen. The canvas of the story is bigger, but it's still THE SIMPSONS with a colossal mess-up by Homer as the center of the story.
Homer (Dan Castellaneta, who also voices Barney, Grampa, Krusty) adopts a pig, but really doesn't know how to care for it. With Harry Plotter (that's the pig's second name) grabbing his attention, Bart (Nancy Cartwright, who also voices Ralph, Nelson) wishes he had a father who actually paid attention to him, leading him to bond with uber-good-doer Ned Flanders (Harry Shearer, THIS IS SPINAL TAP). When Marge (Julie Karvner) tells Homer to get rid of the silo of pig waste in the backyard, Homer cuts corners in an effort to get free donuts and dumps the silo in Springfield Lake, which pushes the already putrid waters over the edge. This spurs EPA head Russ Cargill (Albert Brooks, DEFENDING YOUR LIFE) to convince President Arnold Schwarzenegger (Shearer) to put a dome around the town of Springfield and plan to turn it into the new Grand Canyon. So in an effort to save himself and his family from an angry mob of Springfield townfolk, Homer packs up Marge, Bart, Lisa (Yeardley Smith, AS GOOD AS IT GETS) and baby Maggie (Cartwright) and heads off to Alaska. But as things get worse in Springfield, can Marge motivate Homer to become a hero?