Late Show with David Letterman S6E153 Bill Cosby, Jon Favreau
Watch Late Show with David Letterman Season 6 Episode 153 Online – 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.
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