Robin Williams, Shannen Doherty, Duffy Late Show with David Letterman : Season 16 Episode 3

Following the previous night's acceptance speech, Dave admits to underestimating Gov. Sarah Palin; Andy Kindler makes his last report from the GOP convention in Minneapolis; Robin Williams throws in his two cents on the election; Shannen Doherty plugs the new 90210 and describes surviving the Southern California mudslides; Duffy performed "Warwick Avenue."