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Secrets of the Underground 2017
TV-PG

  • 2018-10-23T22:00:00-04:00s at 2018-10-23T22:00:00-04:00 on Science Channel
  • 2017-02-15T03:00:00+00:00
  • 60 mins
  • 11 hours, 6 mins
  • United States
  • English
  • Reality

Scientist Rob Nelson investigates the strangest underground locations in the world.

2 seasons

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