When Homer gets an old film roll developed, the family takes a trip down memory lane to see the origins of how Bart and Lisa first started fighting with each other. Blackboard: 'I will not pay my sister to do my punishment'.

After Bart gets bullied at the school dance, Marge convinces the town to pass anti-bullying legislation. Homer then gets arrested and sent to rehab for bullying Ned Flanders, only to subsequently leave rehab as a hero.