If you don't know NBC has been struggling for awhile now to get any viewers for a lot of their shows. Other than The Voice, NBC has been struggling to consistently have anyone watch just about anything they have on. For example on Thursday, which used to be their big night full of big comedies, now pulls in about half of all other major networks and their direct competition is the CW rather than CBS, ABC, or Fox.
Today, however, NBC began what they hope to be a return from the ashes. They renewed Revolution, Grimm, Chicago Fire, Parenthood, and Law and Order: SVU. Okay sure, these shows were mostly easy buckets when it comes to renewing shows. Grimm and Law and Order bring in consistent viewers on a weekly basis and Revolution may be young but has a decent following.
The hard part for NBC is still on the horizon, deciding if shows like Community should continue on when they'll be losing The Office and Parks and Rec very soon. Only time will tell how NBC will fair and how they might try and recover. Perhaps we're seeing the beginning of the end for one of the major television networks.