Season 2
01. U-Boats in the Gulf!
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02. Sinking on the St. Lawrence
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03. Death by Human Torpedo
Exploring the wreckage of the USS Mississinewa, which was sunk near the Caroline Islands in 1944 by a Japanese torpedo manually guided on a suicide mission.
04. Graveyard of Ships
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05. Death in the Pacific
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06. Destroyer Down
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07. The Lost Tanks of D-Day
Exploring the wreckage of Duplex Drive Tanks that sank off the coast of Normandy during the D-Day invasion on June 6, 1944.
08. Explosion at Sea
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09. Secret Underwater Caves
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10. D-Day Minesweeper
Exploring the World War II minesweeper YMS-304, which was sunk off the coast of Normandy a month after the D-Day invasion.
11. Time Bomb of the Deep
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12. Underwater Train Wreck
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13. Death in the Mediterranean
This episode explores a ferryboat that sank off the coast of Sicily in 1996.
14. The Confederacy's Secret Weapon
It was the first submarine ever to sink an enemy ship, but after only one successful mission the H.L. Hunley vanished with its crew and lay hidden for more than a century. The circumstances surrounding the disappearance of the Confederacy’s secret weapon have remained an enduring mystery since the Civil War era, but now NGC has uncovered what may have brought it down.
15. Pearl Harbor's Revenge
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16. Mystery Sinking in Bermuda
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17. Mystery U-Boat of World War I
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18. Tugboat Down!
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19. Cruiser Under Siege
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20. Ship of Doom
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21. Sinking by Sabotage
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