When Homer mistakenly pollutes the river with toxic waste from the power plant, he loses his job and forces evacuation from Springfield, possbly forever.
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Airs Sunday When Homer's mother Mona unexpectedly passes away, Homer is filled with guilt for not telling her how much he loved her before she died. To make it up to her, Homer decides to fulfill her final wishes by throwing her ashes over Lake Wastershare at Springfield Monument Park. Glenn Close guest-voices as Mona, and Lance Armstrong as himself.
A promotional image for the season finale, guest starring Drew Carey, has been revealed. The season concludes on May 18. As Krusty's new assistant, Lisa steals the spotlight and gets her own television show, leaving Krusty behind. But when she's honored as Entertainer of the Year at the Springfield Media Awards, she realizes that the she may not be cut out for showbiz...