The Simpsons is crazy enough as it is, but their best sci-fi episodes show just how much they're willing to go out there.

You probably have a favorite character from “The Simpsons.” If you are devoted to the iconic cartoon, though, you surely have your favorite minor character as well.

“The Simpsons” slathered on the fan service for this year’s Halloween special—and it worked. A clever jaunt through past, classic moments, it may rank among the top episodes ever.