The charismatic Sir Lionel Frost considers himself to be the world\'s foremost investigator of myths and monsters. Trouble is, none of his small-minded, high-society peers seems to recognize this. Hoping to finally gain acceptance from these fellow adventurers, Sir Lionel travels to the Pacific Northwest to prove the existence of a legendary creature known as the missing link.
After Homer accidentally pollutes the town\'s water supply, Springfield is encased in a gigantic dome by the EPA and the Simpsons are declared fugitives.
