While "retiring" anchor Pat Persaud wallows in self-congratulatory monkeyshit and (probably) sobs off into the sunset, Channel 7 is airing its 10 p.m. Wednesday newscast commercial-free. This is supposedly "Plan B" for Wednesday. There was talk of having anchor Julie Cornell and her husband, Chief Meteorologist Bill Randby, spend the whole 35 minutes doing the horizontal mambo on the anchor desk,