When did Underground Worlds Season 1 Episode 8 air?
Underground Worlds Season 1 Episode 8 aired on November 13, 2019.
Underground Worlds
British documentary series exploring incredible feats of human endeavour underground, revealing what people have built, where they have built it, how and why.
Season 1 · Episode 8
The Maginot Line
Nov 13, 2019·45m
The secrets of the largest subterranean fortress along France's border with Germany, and a look at how a unique precious mineral was discovered in Derbyshire.
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How long is Underground Worlds Season 1 Episode 8?
This episode runs for approximately 45 minutes.
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