Episode Description: Beware, spoilers! To read - hover over the text.
Bart accidentally opens an unknown comet, which is called by his name. But the comet is flying to Springfield. The city is threatened with destruction, the missile is designed to destroy the comet misses and destroys the only bridge out of town, starts to panic. The shelter is only for Flanders, but it is designed for two families (the Flanders and the Simpsons).