The Simpsons (1989): Season 19, Episode 19

19 - 19: Mona Leaves-a

When Homer's mother Mona (guest voice Glenn Close) 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. Blackboard: 'This punishment is not medieval.'.