“NATURE” follows the four-year emotional rollercoaster of acclaimed filmmaker Simon King as he hand-rears orphaned brothers Toki and Sambu from cuddly cubs to big cats, preparing them to return to the wild. “The Cheetah Orphans” premieres on PBS Sunday, November 11 at 8 p.m. (check local listings). br br Simon King narrates the film, part of the 26th season of “NATURE,” the Peabody and Emmy award-winning series produced by ThirteenWNET New York for PBS. Major corporate support provided by Canon U.S.A. Inc. and Toyota.