Late Show with David Letterman (1993) : 6x90

Dave says a focus group doesn't like his ""Countdown to the Millennium"" segment, so Paul gives one last fact: ""Danny Aiello will get another series."" Rather than bow down in defeat, Dave introduces a segment called ""Shark Week,"" which actually started the previous night. The premise is that Dave and Paul try to talk about sharks, but quickly come to realize that they know almost nothing about them, and change the topic.