Humanity has launched satellites into outer space and submarines to the ocean floor, but the ground below Earth's surface remains shrouded in mystery. Are there profound secrets buried beneath layers of rock, or hidden in vast caves?
Subtitles: English
Starring:William Shatner
Season 6
S06:E01 - The World Beneath Our Feet
Humanity has launched satellites into outer space and submarines to the ocean floor, but the ground below Earth's surface remains shrouded in mystery. Are there profound secrets buried beneath layers of rock, or hidden in vast caves?
S06:E02
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S06:E03
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S06:E04
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S06:E05
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S06:E06
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S06:E07
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S06:E08
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S06:E09
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S06:E10
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