Secrets of the Underground

Season 22017

A search for an underground escape route said to have been used by Al Capone. Also: who or what built earthen mounds in Washington state.

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A search for an underground escape route said to have been used by Al Capone. Also: who or what built earthen mounds in Washington state.

First Aired
February 14, 2017
Last Aired
December 16, 2017
Runtime
1h 0min
Seasons
2
Episodes
16
Genre
RealityDocumentary
Status
Returning Series
Language
English
Network
Science
Production
Science Channel
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