Just to satisfy my curiosity, I'm keeping a table showing average ratings by network for new episodes of shows for Monday-Thursday. Those are the nights that the network suits attempt to place continuing series programs that they expect to make their network competitive. Beyond that, strategies differ. Obviously NBC skews Sunday with NFL football. CBS tries to maintain its competitive edge on Friday while it's a graveyard for Fox shows. And sometime in my lifetime Saturday disappeared off the calendar in the broadcast TV world. The table below is based on ratings through the past week, which is to say they include premiers and a varying number of episodes of shows. If you need to see a large spreadsheet version, just click on the table: It is no surprise that overall CBS has a substantial lead in the 50+ age group. What is surprising is that they have a slight overall lead in the demo. Keep in mind that these numbers involve new episodes of the regularly scheduled programs.