Advertisements Agreed. Just 10 years ago, NBC was the king of the networks. With the demise of its dominant Thursday night comedy block, the departure (finally!) of ER, the reliance on multiple versions of L&O, high profile failures like Studio 60, the dramatic dropoff of previously good shows like Heroes, the overuse of reality shows (2-hour editions of Biggest Loser and The Apprentice) and now finally the Leno decision, NBC has simply gone in the tank. Most of it can be attributed to the network's execs, some must be blamed on the writers of the individual shows, and some of it is just bad luck or bad timing. But very little of it has to do with putting Jay Leno on at 10 pm this season.