With the TV network up fronts set to hit shortly, time has run out on their opportunity to make decisions about the fate of certain shows. Thankfully they appear to have been in a generous mood this week with numerous series scoring another season. The CW The CW has given renewals to three of its long performing and solid rating dramas - "Supernatural" will get an eighth season, "The Vampire Diaries" a fourth and "90210" a fifth. The fates of "Nikita,” “The Secret Circle,” “Ringer,” “Hart of Dixie" and "Gossip Girl" are unknown at this time but it's expected at least three of them will strike out. Southland TNT has renewed the L.A.