For the next eight weeks, the networks will mix in reruns with new episodes and premiers of new shows. Each network will be evaluating which shows to continue next year using criteria which, contrary to the "bubble" watching pundits, aren't completely predictable. Then in mid-May the networks will hold their annual "upfronts" to sell the Fall shows to advertisers. At times we have seen some shows not get their Fall pickup until the night before its network has scheduled its upfront. (Note that some cable channels are already holding their upfront presentations.) And so it begins with the ratings for the first Thursday of Spring 2013: Fox was the only network between 8-10 pm where one could turn to see no repeat last night. That was, of course, a 2 hour "American Idol" which allowed Fox to win the 8-10 pm race with a 3.8 million demo and 8.7 million 50+. That seems like a hollow victory because a 2 hour "Idol" last year pulled a 5.3 million demo and 13 million in the 50+ crowd. CBS ran reruns of its regular programming at the regular times. It won the 8-11 pm race. A rerun of "The Big Bang Theory" actually beat "Idol" in the 50+ crowd which wasn't true last year. The rerun of "Person of Interest" actually scored slightly higher than last year in the demo. But the rerun of "Elementary" scored slightly lower than a rerun of the "The Mentalist" last year. ABC's new episode of "Zero Hour" actually scored lower than a rerun of "Missing" last year. The Kimmel rerun also scored lower than last year. NBC is getting ready for next year. The CW. No one can quite figure out what they are doing.