Mysteries of the Outdoors - Season 2 Episode 5 Subterranean Secrets
Mysterious lights, mechanical sounds from deep within the Earth and the disappearance of dozens of aircraft over the Great Smoky Mountains National Park could be evidence of a powerful secret society with an underground base in the area.
First Air Date: Oct 23, 2015
Last Air date: Sep 01, 2017
Season: 2 Season
Episode: 20 Episode
Runtime: 21 minutes
IMDb: 10.00/10 by 1.00 users
Popularity: 0.362
Language: English
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