Episode 1: Winter. In winter, Yellowstone National Park is frozen solid, buried by snow as deep as a house. While the herds of elk and bison are gradually weakened by the cold, the wolves grow stronger.
Episode 1: Winter. In winter, Yellowstone National Park is frozen solid, buried by snow as deep as a house. While the herds of elk and bison are gradually weakened by the cold, the wolves grow stronger.