Watched 0 of 19 episodes this season
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Jan 8, 1991
S18E01 - Return to Mt. St. Helens
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Apr 30, 1991
S18E02 - ConFusion in a Jar
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Feb 5, 1991
S18E03 - The Hunt for China's Dinosaurs (1)
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Feb 12, 1991
S18E04 - Case of the Flying Dinosaur
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Feb 19, 1991
S18E05 - T. rex Exposed
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Feb 26, 1991
S18E06 - The Russian Right Stuff: The Invisible Spaceman
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Feb 27, 1991
S18E07 - The Russian Right Stuff: The Dark Side of the Moon
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Feb 28, 1991
S18E08 - The Russian Right Stuff: The Mission
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Mar 5, 1991
S18E09 - Swimming With Whales
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Mar 26, 1991
S18E10 - The Chip vs. the Chess Master
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Oct 1, 1991
S18E11 - Sex, Lies and Toupee Tape
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Oct 9, 1991
S18E12 - So You Want to Be a Doctor?
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Oct 15, 1991
S18E13 - Secrets of the Dead Sea Scrolls
Oct 22, 1991
S18E14 - Suicide Mission to Chernobyl
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Nov 5, 1991
S18E15 - Taller Than Everest?
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Nov 12, 1991
S18E16 - Fastest Planes in the Sky
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Dec 3, 1991
S18E17 - Avoiding the Surgeon's Knife
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Dec 10, 1991
S18E18 - Skyscraper! A NOVA Special
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Dec 17, 1991
S18E19 - The Fine Art of Faking It