Except for Seinfeld's finale when returning cocreator David turns spiteful, unforgiving moralist, making Jerry, George, Elaine, and Kramer pay for all their years of ''selfishness, self-absorption, immaturity, and greed.'' Seinfeld: The Lost Episode arguably does a better job of meeting audience expectations for a Seinfeld finale by mocking the show's most sacred cow - the show itself.