This documentary is in fact the theatrically released episode of 'Epic Yellowstone: Return of the Predators'. For decades, Yellowstone National Park's ecosystem was out of balance. Its wolves had vanished, and its grizzly bears were pushed to the edge of extinction. Now, through conservation efforts and one of the most ambitious restoration projects in history, the carnivores have returned in record numbers. Host Bill Pullman gives you an up-close look into nature's dramas over the course of a year.