BBC nature documentary in which presenters Kate Humble and Patrick Aryee witness the changing seasons at Yellowstone National Park. The team track the landscape and animals that populate the region from winter to summer as they deal with the changing extreme conditions. The park is home to some of North America's most iconic native wildlife including grizzly bears, bison, wolves and grey owls. Kate looks at the science behind the park's harsh winter, while after the thaw nature springs into life. However, with the approaching hot and dry summer, the danger of wildfires loom. The episodes are: 'The Wildest Winter', 'The Toughest Spring' and 'The Blazing Summer'.

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