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S12.E1 ∙ The Cleanest Place in the World
Mon, Jan 6, 1975
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S12.E2 ∙ The Transplant Experience
Mon, Jan 5, 1976
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S12.E3 ∙ Intimate Strangers
Mon, Jan 12, 1976
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S12.E4 ∙ A Fair Share of What Little We Have
Mon, Jan 19, 1976
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S12.E5 ∙ The Incredible Machine
Mon, Jan 26, 1976
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S12.E6 ∙ King Coal Revived
Mon, Feb 2, 1976
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S12.E7 ∙ A Question of Trust
Mon, Feb 9, 1976
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S12.E8 ∙ The Case of the Bermuda Triangle
Mon, Feb 16, 1976
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S12.E9 ∙ The Lords of the Labyrinth
Mon, Feb 23, 1976
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S12.E10 ∙ Inside the Shark
Mon, Mar 1, 1976
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S12.E12 ∙ The Edelin Affair
Mon, Mar 15, 1976
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S12.E13 ∙ The World of Margaret Mead
Mon, Mar 22, 1976
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S12.E20 ∙ Dying
Mon, May 24, 1976
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S12.E21 ∙ The Great British Drought
Wed, May 26, 1976
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S12.E22 ∙ A Home Like Ours... A Story of Four Children
Mon, Jun 7, 1976
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S12.E23 ∙ What's Wrong with the Sun?
Mon, Jun 14, 1976
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S12.E24 ∙ The Bull's-Eye War
Mon, Oct 25, 1976
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S12.E26 ∙ The Trobriand Experiment
Mon, Dec 29, 1975
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S12.E27 ∙ The Selfish Gene
Mon, Nov 15, 1976
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S12.E29 ∙ Secrets of a Coral Island
Mon, Nov 29, 1976
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S12.E30 ∙ The Long Valley
Mon, Dec 6, 1976
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