IN THE FALL of the year, when the leaves turn red or gold or a disappointing brown, fledgling television programs come fluttering out of their producers' nests. From the moment they reach the airwaves, these dewy little creatures are caught up in the life-and-death struggle to find viewers. Of a dozen fledglings, only two or three will survive until next year. That's why many new programs adopt a tactic known to biologists as Batesian mimicry: They take on the coloration of an... More >>>