Season 18.
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.Return to Mt. St. Helens
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Episode 2.ConFusion in a Jar
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Episode 3.The Hunt for China's Dinosaurs (1)
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Episode 4.Case of the Flying Dinosaur
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Episode 5.T. rex Exposed
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Episode 6.The Russian Right Stuff: The Invisible Spaceman
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Episode 7.The Russian Right Stuff: The Dark Side of the Moon
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Episode 8.The Russian Right Stuff: The Mission
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Episode 9.Swimming With Whales
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Episode 10.The Chip vs. the Chess Master
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Episode 11.Sex, Lies and Toupee Tape
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Episode 12.So You Want to Be a Doctor?
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Episode 13.Secrets of the Dead Sea Scrolls
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Episode 14.Suicide Mission to Chernobyl
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Episode 15.Taller Than Everest?
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Episode 16.Fastest Planes in the Sky
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Episode 17.Avoiding the Surgeon's Knife
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Episode 18.Skyscraper! A NOVA Special
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Episode 19.
Noah's Ark 
The Lord of the Rings: The Return of the King 
Taffy 
The Lord of the Rings: The Two Towers 
