BBC Programme Yellowstone National Park
How Yellowstone's Indian tribes were displaced to create this great American wilderness.
Horizon - 2010-2011 - Predators in Your Backyard
Investigating why scientists are releasing predators close to where people live.
Charting the possible consequences of a supervolcanic eruption under Yellowstone Park.
Yellowstone - Winter
Following Yellowstone's wildlife in a fight to survive six freezing winter months.