Three strangers are challenged to endure days underground while navigating prehistoric cave systems, ancient subterranean cities and centuries-old abandoned mines.
S0 E5: Downward Spiral
To escape a cave-mine hybrid system burrowed deep into a mountainside, three strangers must descend a mile in total darkness - and not all of them will make it.
S0 E6: Underground Waterworld
Three strangers enter a cave-mine in total darkness, deep underground in a remote part of Virginia, where they must contend with giant underground waterfalls.
S1 E1: 150 Miles Of Tunnel
Three strangers enter an abandoned silver mine in the Mojave desert in total darkness. Will they find one another and a way out of the 150 miles of tunnel?
S1 E2: Forgotten Tomb
Three strangers battle isolation, hallucination, and starvation as they struggle to escape an abandoned Cold War fallout shelter 240-feet below ground.
S1 E3: Cave Of The Seven Serpents
Three men attempt to survive six days in complete darkness, as they fight to escape a treacherous cave buried deep under the Ozark Mountains.
S1 E5: Downward Spiral
S1 E6: Underground Waterworld
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