Epic Yellowstone

Winter in Yellowstone. Driving snow and temperatures 50 degrees below zero collide with spewing heat from subterranean forces, creating dramatic, otherworldly displays. Host Bill Pullman embarks on a journey over vast blankets of snow, through sparkling prisms of "diamond dust", and across rivers warmed by geothermal springs. Marvel at the park's wildlife and see how the area's extreme conditions pose challenges even for animals that have evolved to survive its winters.

The wolves have returned. The grizzly bear population is at an all-time high. The mountain lions never left. It's the dawn of a new era - and Yellowstone will never be the same. The presence of these predators touches every corner of Yellowstone. But on this rugged battlefield many questions remain: what does it take to survive, protect your turf, and raise young - all while trying to stay at the top of the food chain?

It's a bird's eye view of a iconic place, Yellowstone. Soaring above Old Faithful and the Lower Falls, winged creatures survey an extraordinary landscape. But a bird's life in the extremes of the world's first national park isn't an easy glide.

It's among the last of its kind: a river, still wild. The Yellowstone flows from the world's first national park into the life of the west, moving as few rivers do. Undamed, untamed, it changes with the seasons in a journey from the peaks to the plains.