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  • 2019-03-12T00:00:00Z on National Geographic Channel
  • 45m
  • 6h (8 episodes)
  • English
  • Documentary
Explore a world never seen before a world hidden under miles of water, the landscape of the seabed. Join expeditions to dive long-lost vessels, discover ancient sites and follow the scientists who are probing the darkest and deepest corners of this underwater world. Computer generated, three-dimensional maps and imagery will offer a first glimpse of these mysteries.

8 episodes

Series Premiere

2019-03-12T00:00:00Z

1x01 Sunken Cities

Series Premiere

1x01 Sunken Cities

  • 2019-03-12T00:00:00Z45m

Lost civilizations, mysterious cities and legendary sites have all vanished. Can draining the seas help unlock what caused their demise?

2019-03-19T00:00:00Z

1x02 Treasures of The Deep

1x02 Treasures of The Deep

  • 2019-03-19T00:00:00Z45m

For centuries treasure ships sailed the world hunted by pirates, battered by storms and reefs. Only now can we begin to explore what remains of them.

2019-03-26T00:00:00Z

1x03 Sunken War Ships

1x03 Sunken War Ships

  • 2019-03-26T00:00:00Z45m

Under the seas lives a lost graveyard of sunken war ships. Countless vessels from WWI and WWII pepper the seafloor waiting to be explored.

2019-04-02T00:00:00Z

1x04 Stormy Seas

1x04 Stormy Seas

  • 2019-04-02T00:00:00Z45m

Towering walls of water, powerful winds and churning seas can overwhelm any ship. But what secrets of the stormy seas can now be revealed?

2019-04-09T00:00:00Z

1x05 Sabotage On The High Seas

1x05 Sabotage On The High Seas

  • 2019-04-09T00:00:00Z45m

In warfare, saboteurs are a silent, unseen enemy with advanced weaponry and their element of surprise sending many ships to their final resting place.

2019-04-16T00:00:00Z

1x06 America's Sunken Shores

1x06 America's Sunken Shores

  • 2019-04-16T00:00:00Z45m

War, weather and human error have led to some of the worst maritime disasters history. Drained dry we now reveal the mysteries along America’s shores.

2019-04-23T00:00:00Z

1x07 Deep Water Disasters

1x07 Deep Water Disasters

  • 2019-04-23T00:00:00Z45m

The seafloor is the world’s biggest tsunami machine and its dangers have remained hidden from view, until now!

Season Finale

2019-04-30T00:00:00Z

1x08 Undersea Empires

Season Finale

1x08 Undersea Empires

  • 2019-04-30T00:00:00Z45m

Beneath the waters of the world, lies undersea empires and relics of their bloody wars. Can today’s technology uncover these lost empires?

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