Yellowstone Wolves The Renewal of Nature

Some 70 years after their extermination, in 1995 wolves were resettled in Yellowstone National Park, restoring an entire ecosystem which had been completely out of balance. Filmed over the course of a year-and-a-half, this documentary follows the largest pack in the park and tells a unique success story, with surprises and unexpected setbacks. Their influence extends down the entire food chain.