1. Sunken Weapons of War

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. 45 min

An underwater look at the weapon that destroyed one of the Civil War's greatest ships, as well as the torpedo technology that changed military warfare.

2. America's Lost Treasures

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. 45 min

Experts explore how the history of America is hidden beneath its harbours, shorelines and street.

3. Disasters at Sea

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. 45 min

The team explores the watery graves of passenger ships and war machines as they investigate what led to such shocking maritime disasters.