After learning that he never received any of the weekly care packages his mother sent, Homer goes to the post office to claim them, taking Mona with him. While they are there, Burns recognizes Mona and calls the FBI, who track her to the Simpsons home. Before she can be arrested, Homer receives an anonymous tip that his mother is about to be arrested and he helps her escape. The tipster is later revealed to be Chief Wiggum, who was a security guard at Burns' lab until the antibiotic mist cured his asthma and allowed him to finally enroll in the police academy. Realizing she must again go into hiding, Mona says goodbye to Homer as she departs with another group of hippies. After she leaves, Homer sits alone on his car and watches the stars well into the night.