About this showing of Secrets Underground
Rob Nelson investigates mysterious tunnels under Denver's airport. Plus, in Ohio he tries to uncover the secrets of a giant serpent-shaped mound.
Previously on TV
Secrets Underground
Mystery Of The Serpent Mound
Previously shown on Discovery .Science on Wed 16 Sep 2026 at 14:00.
This showing has ended
This showing was on Discovery .Science at 14:00 on Wed 16 Sep 2026. See future airings below or open the main programme page for the latest TV times.
Airing details
ChannelDiscovery .Science
StartsWed 16 Sep 2026, 14:00
EndsWed 16 Sep 2026, 15:00
Episode / edition: Mystery Of The Serpent Mound
SkySky Q / Satellite167Next showing of Secrets Underground
The next currently listed showing is Mon 21 Sep 2026, 13:00 on Discovery .Science.
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