Jay Leno is staying at NBC, and he's moving to prime time. The network announced on the "Today" show Tuesday that Leno will host a show on weeknights at 10 p.m, after he leaves the "Tonight" show.

The network announced earlier that Conan O'Brien is moving to the "Tonight" show to take Leno's place. The deal not only prevents Leno from moving to another network and competing with O'Brien, but also has the potential to be a big cost savings for NBC. Dramas at 10 p.m. Eastern used to be a mainstay of network schedules, but they have been fading particularly on NBC. Other than Prison Break, Lost, Law and Order most of the other shows are struggling to meet costs.

I believe one reason is digital video recorders: more people are watching shows they taped earlier than the live 10 p.m. shows. I am pretty sure that when this is done, the network doesn't get the rating.