When to Watch: Thursday, May 9 at 8:30 p.m. What to Expect: The cult sitcom's season-four finale also serves as a proper series finale, should NBC choose not to renew it. "Hopefully you will not be disappointed with the ending," leading man Joel McHale says. "There will be sex and violence." Fans can expect the darkest timeline, introduced in season three, to play a major factor. The final will also serve as Chevy Chase's last appearance on the show.