When Bart is forced to assist Principal Skinner in early-morning astronomy observations, he discovers a giant comet heading towards Springfield. Facing impending doom, the entire town shows up at the Flanders family bomb shelter.
Elenco:
Dan Castellaneta
,
Julie Kavner
,
Nancy Cartwright
,
Yeardley Smith
,
Hank Azaria
,
Harry Shearer
.