Late Show with David Letterman

Season 6, Episode 153

Episode Title: Bill Cosby, Jon Favreau

Air Date: 1999-05-14

Overview:

With tonight's audience being from the City of Brotherly Love, Biff heads to Philly to get in training a la Rocky. For his efforts, he is given a medal by Philadelphia Mayor Edward Rendell and Sylvester Stallone's brother Frank.