Watch 13 Clips from The Simpsons 400th Episode! Go behind-the-scenes with Keifer Sutherland and the cast and crew! Brian B. — May 17, 2007 in TV News Facebook Twitter Reddit Email Comment We've got your first look at clips from The Simpsons 400th episode starring 24's Keifer Sutherland. The Simpsons 400th episode airs this Sunday at 8/7c. RELATED: How Has The Simpsons Changed Since the Disney Takeover? Dont't forget to also check out: The Simpsons Topics: The Simpsons Brian B.