viewing. obviously david letterman, some one who created the late night talk show in so many ways. different than johnny carson. similar to johnny carson. think what he created, top ten list, stupid pet tricks. throwing things off the roof of buildings. just really a staple in so many people's lives for so long. and that's why you are seeing amazing ges come on. bill murray his final guest. lot of surprises for the final show. just all the guests leading up, george clooney handcuffed himself to david letterman on the show last week he didn't want him to leave. i think that really is the sentiment so many people have. >> yeah, going to be interesting watching that. of course talking final shows, "mad men" just finished. so a sad day of course for all those fans out there. let's look at the show's huge cultural impact. and why it is ending now. >> oh, yeah, you know, raise your hand if you spent the weekend watching the amc marathon of "mad men." because if you turned it on, on,