In the race to develop cutting edge technology for the Second World War, many nations focused on how to evade radar detection.
Down in the Naval Shipyard in Philadelphia, if the rumours are to be believed, the US Navy took it to a whole other dimension...
Written by Neil McRobert and produced by Richard MacLean Smith
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Season 09 Episode 22: Dwell Among the Bones
30:49

Season 09 Episode 21: Triangled Veils
32:24

Season 09 Episode 20: Over the Hills and Far Away
30:02