1: The Nature of Things The Buffalo Wolves

2: The Nature of Things Babies: Born to be Good?

3: The Nature of Things Nuts About Squirrels

4: The Nature of Things The Norse: An Arctic Mystery

5: The Nature of Things Lights Out!

6: The Nature of Things David Suzuki's Andean Adventure

7: The Nature of Things Zapped: The Buzz About Mosquitoes

8: The Nature of Things Shattered Ground

9: The Nature of Things Meet the Coywolf

10: The Nature of Things The Fruit Hunters: Evolution of Desire (Part 1 of 2)

11: The Nature of Things The Fruit Hunters: Evolution of Desire (Part 2 of 2)

12: The Nature of Things Billion Dollar Caribou

13: The Nature of Things The Beaver Whisperers

14: The Nature of Things The Beetles Are Coming

15: The Nature of Things The Man Who Tweeted Earth