Mona Leaves-a

[4] As the Simpson family arrive home from their trip to the Springfield mall, they find their door is open, suggesting a burglar is inside the house.

Bart fetches Homer a makeshift weapon made from a cinder block tied to a chain that he calls "The Defender".

When he then notices and questions that she is "sleeping with her eyes open", her head slumps down and Homer realizes that she has died.

After Mona's funeral, Homer is depressed and guilt-ridden for not apologizing to his mother and struggles to come to terms with her death, especially since he blames himself for her passing.

For Homer, however, she leaves a task: to take her ashes to the highest point at Springfield Monument Park and scatter them at exactly 3:00pm.

He releases her ashes, only to find they travel inside the mountain and disrupt a secret nuclear missile launch.

There, Mr. Burns explains the purpose of the missile: to send the city's nuclear waste into the Amazon Rainforest.

However, he accidentally pushes the self-destruct button, exploding the launch site and representing Mona's final victory, through her family and over all the things she spent her life fighting for.

[6] A fraction of Jefferson Airplane's "White Rabbit" is heard after Marge sets her purse on fire.

[4][8] Both Robert Canning of IGN and Richard Keller of TV Squad called it a decent episode, but criticized Mona's brief appearance.