For producers of underperforming television shows, this is the scariest time of the year -- and it's got nothing to do with Halloween specials. By now, the glow of premiere season has long since worn off, and shows we couldn't wait to see just a few short months ago are in serious danger of getting the hook.

Truth be told, the majority of broadcast shows are floating precariously atop the cancellation bubble. A world without 'Fringe'? An NBC Thursday night without 'Community'? Folks, it could happen.

Take NBC: the struggling network is aggressively developing new shows, desperate for a hit. Can old standbys like 'Parks and Recreation' survive when big dogs Sarah Silverman and Dane Cook are all developing new shows at the Peacock network?

A few notches away on the dial, CBS's 'CSI' franchise is starting to fizzle and the network has its eye on new comedies. With three different 'CSI' shows, it's safe to say one will probably go.

Who will survive this season? Only time will tell, but any of these shows could be goners by May.