The CW, the network that probably shouldn’t exist, is broadcasting a half-hour fall preview special tonight from 6:30-7PM Eastern. You might want to tune in because who knows how much longer the network will be around. It was born when The WB and UPN merged a few years ago; another new network, MyNetworkTV, was also born from that merger (mostly made up of UPN affiliates). But it has decided to become a syndication outlet this fall with no original programming. And The CW is cutting back to airing two hours an evening Monday through Friday. That means just 10 hours a week. The Big Three — ABC, CBS and NBC — broadcast 22 hours a week while FOX airs 16 hours a week.