Season 1

Working alongside divers, wreck investigators and archaeologists, the series tells the stories of the final moments of ships and those on board as they meet disaster. Unpicking the evidence of the wreckage with state-of-the-art CGI and the latest underwater technology and combining it with powerful personal testimony brings out the human side of these tragedies as well as revealing the answers to the questions of what happened and why.

1. 1. Assassins of the Deep

   2021-10-08 · 44m

   This episode looks at 3 different German U-Boat wrecks, including UC-66 - the first to be sunk by a plane and U480 - the world’s first stealth sub.

2. 2. Danger Ahead

   2021-10-15 · 44m

   Armed with the latest undersea technology and personal testimony, we board two doomed ships to discover what set them on the path to catastrophe.

3. 3. Last Days of the Battleship

   2021-10-29 · 44m

   Survivors' stories and world-leading shipwreck investigators uncover how even the most powerful warships had their weaknesses and paid a fatal price.

4. 4. Nuclear Wrecks

   2021-10-22 · 44m

   We uncover the remains of warships from the remote Pacific to the Atlantic, revealing new insights into how the atom bomb changed our world forever.

5. 5. Savage Revenge

   2021-10-29 · 44m

   How the Americans launched a massive bombardment of the Japanese fleet– and how the German liner Wilhelm Gustloff was torpedoed by a Russian sub.

6. 6. Failed Invasions

   2021-11-05 · 44m

   Two of the greatest failed invasions in the history of naval warfare. How the Spanish Armada was defeated and why the Allied fleet was crushed in WW1

7. 7. The Lost Fleet of WWI

   2021-11-12 · 44m

   Investigations reveal the greatest scuttle and act of defiance in wartime history. Testimonies and CGI illuminate the events and subsequent salvage.

8. 8. Collisions at Sea

   2021-11-19 · 44m

   Investigations into three historical collisions expose the volatile risks at sea and how they have shaped regulations and technological advancements.

9. 9. Toxic Wrecks

   2021-11-26 · 44m

   We discover two ships laden with deadly cargos. The sunken beasts are ticking time bombs and no one knows exactly when or how they might explode.

10. 10. Scotland's Sea Secrets

    2021-12-03 · 44m

    During WW1 two warships sank in controversial circumstances north of Scotland. We can now bring these two deeply mysterious wreck stories to life.