Late Show with David Letterman

Season 6, Episode 65

Episode Title: Tom Brokaw, Famke Janssen, Emmylou Harris

Air Date: 1998-12-11

Overview:

Tom Brokaw drops by sporting a turtleneck sweater in lieu of his usual two-piece suit, and pretty soon Biff is handing out turtlenecks to the audience. By the end of the show, even Dave is wearing one.