Season 21

1.Codebreakers

2.Dinosaurs of the Gobi

3.Daredevils of the Sky

4.Journey to Kilimanjaro

5.Can Chimps Talk?

6.In Search of Human Origins, Part One

7.In Search of Human Origins, Part Two

8.In Search of Human Origins, Part Three

9.Can China Kick the Habit?

10.Aircraft Carrier!

11.The Great Wildlife Heist

12.Secret of the Wild Child

13.Haunted Cry of a Long Gone Bird

14.What's New About Menopause

15.The Tribe that Time Forgot

16.Killer Quake!

17.Buried in Ash

18.Rescue Mission in Space

19.Journey to the Sacred Sea

20.In Search of the First Language