The alien Burt prevents Mary from seeing the real Burt; Eunice admits that she can't stand Dutch; Billy takes Leslie to an out-of-the-way place where they must avoid being seen by Chester and Eunice; and the mismatched Tim and Corinne agree to divorce.

Billy tries to take Leslie to a hotel, but it's the same one in which every member of his family seems to be planning to spend the night; the two Burts meet for a final confrontation.