S21 E1: Codebreakers

S21 E2: Dinosaurs of the Gobi

S21 E3: Daredevils of the Sky

S21 E4: Journey to Kilimanjaro

S21 E5: Can Chimps Talk?

S21 E6: In Search of Human Origins, Part One

S21 E7: In Search of Human Origins, Part Two

S21 E8: In Search of Human Origins, Part Three

S21 E9: Can China Kick the Habit?

S21 E10: Aircraft Carrier!

S21 E11: The Great Wildlife Heist

S21 E12: Secret of the Wild Child

S21 E13: Haunted Cry of a Long Gone Bird

S21 E14: What's New About Menopause

S21 E15: The Tribe that Time Forgot

S21 E16: Killer Quake!

S21 E17: Buried in Ash

S21 E18: Rescue Mission in Space

S21 E19: Journey to the Sacred Sea

S21 E20: In Search of the First Language