Season 2, Episode 4 - "Brian in Love"
6 March, 2000
Lois suspects Stewie is the one creating all the pee stains around the house, so she decides to potty-train him. When an incident in the supermarket reveals that Brian is the one responsible, he goes to see a therapist. Brian finds out that his love of Lois is causing his accidents, so he decides to confront her.
