Season 5.
Season 1.Season 2.Season 3.Season 4.Season 5.Season 6.Season 7.Season 8.Season 9.Season 10.Season 11.Season 12.Season 13.Season 14.Season 15.Season 16.Season 17.Season 18.Season 19.Season 20.Season 21.Season 22.Season 23.Season 24.Season 25.Season 26.Season 27.Season 28.Season 29.Season 30.Season 31.Season 32.Season 33.Season 34.Season 35.Season 36.Season 37.Season 38.Season 39.Season 40.Season 41.Season 42.Season 43.Season 44.Season 45.Season 46.Season 47.Season 48.Season 49.Season 50.Season 51.
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Episode 1.In The Event of Catastrophe
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Episode 2.The Green Machine
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Episode 3.Blueprints in the Bloodstream
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Episode 4.One Small Step
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Episode 5.The Final Frontier
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Episode 6.BaMiki BaNdula: Children of the Forest
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Episode 7.Trial of Denton Cooley
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Episode 8.The Great Wine Revolution
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Episode 9.The Case of the Ancient Astronauts
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Episode 10.The Mind Machines
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Episode 11.Icarus' Children
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Episode 12.Still Waters
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Episode 13.Battle for the Acropolis
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Episode 14.The Road to Happiness. : The Life and Times of Henry Ford
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Episode 15.Laser : Light of the 21st Century
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Episode 16.Insect Alternative
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Episode 17.The Desert's Edge
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Episode 18.The Tsetse Trap
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Episode 19.Memories From Eden
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Episode 20.A Whisper from Space
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Episode 21.Alaska: The Closing Frontier