The Simpsons (1989): Season 25, Episode 8

25 - 8: White Christmas Blues

Springfield is inundated with holiday revelers after the nuclear power plant springs a radiation leak, causing snow to fall all over town. When the tourists drive up Christmas shopping prices, Marge opens up the Simpsons' house to boarders. Blackboard: 'I will not call my teacher "prancer" and "vixen".'.