NATURE captures rival wolf packs battling for supremacy in the heart of America's wilderness when In the Valley of the Wolves premieres on PBS Sunday, November 4 at 8 p.m. (check local listings). Shot in HD over three years, the film follows Yellowstone's Druid wolf pack as it struggles for control of the prized Lamar Valley, and shows the interdependence of the valley's diverse wildlife. Academy Award-winning actor F. Murray Abraham narrates. 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.