Late Show with David Letterman: CBS Mailbag: Chris Schmitt of Ottawa, Kansas asks why Biff has a scowl on his face. Biff comes onstage as a lobster is hooked on his backside. Later, Dave explains the formula for comedy success: "Lobster + Ass = Funny!"

Starring:

Alan Kalter, David Letterman, Paul Shaffer

Genre:

Comedy, Music, Talk-Show