Drain the Oceans

Secrets of New York City

Series 2 - Episode 2 Secrets of New York City

Sun 24 Nov 7pm - 8pm National Geographic Channel
See Repeats
Tue 26 Nov, 6pm - 7pm National Geographic Channel
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Summary

The discovery of secrets beneath the ocean around New York, including an earth-shattering feat of engineering and a casualty of First World War stealth warfare.
Documentary