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• 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 I
• S21.E7 ∙ In Search of Human Origins: Part II
• S21.E8 ∙ In Search of Human Origins: Part III
• S21.E9 ∙ Can China Kick the Habit?
• S21.E10 ∙ Aircraft Carrier!
• S21.E11 ∙ The Great Wildlife Heist
• S21.E12 ∙ The 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