Special features of this DVD: animator commentary, David Silverman, Mike B. Anderson, Steven Dean Moore, Rich Moore ; producers commentary, James L. Brooks, Matt Groening, Richard Sakai, Al Jean, Mike Scully, Dvaid Silverman, Dan Castellaneta, Yeardley Smith ; description cards before each deleted scene and slightly alternate ending, "Levels," "Springfield News," "DMV," " Sausage truck" and "Animals painting" ; special stuff ; trailers ; widescreen presentation ; Dolby Digital ; scene selection.

Editor, John Carnochan ; music, Hans Zimmer.

Voice talent: Dan Castellaneta, Julie Kavner, Nancy Cartwright, Yeardley Smith, Hank Azaria, Harry Shearer, Joe Mantegna, Albert Brooks.

Lisa convinces the locals to clean up the polluted Lake Springfield after a crowd of fans sink the Green Day concert stage. Meanwhile, Homer saves a pig from being killed in Krusty Burger and adopts it, calling the animal Spider Pig. After two days, Spider Pig fills up a silo with its excrement and not knowing what else to do, Homer dumps the silo in the lake, polluting it. The angry population forces the Simpsons to move to Alaska. Meanwhile, the president is induced by his advisor from the EPA to put a dome over Springfield to hold in the population and destroy the city. When Marge sees the news on television, she tells Homer that they must return to Springfield to save their town and friends, but Homer is not convinced that the people of Springfield deserve their support.

MPAA rating: PG-13 : for irreverant humor throughout.

DVD.

Audio tracks in English, French and Spanish ; subtitled in English and Spanish ; closed captioned for the hearing impaired.