1. Winter

0

. 15 March 2009. 50 min

Following Yellowstone's wildlife in a fight to survive six freezing winter months.

2. Summer

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. 22 March 2009. 50 min

As the snow melts, the extent of Yellowstone is revealed, but summer here is fickle.

3. Autumn

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. 29 March 2009. 50 min

Elk move down from the mountains and beavers repair their dams in preparation for winter.