Drain the Oceans (2018–present)

1. S01E01Nazi SecretsMay 28, 2018 6.3The hidden secrets of the Nazis are revealed when the oceans covering them are drained using CGI animation.
2. S01E02Season's bestGulf of MexicoJune 4, 2018 7.3Draining the Gulf of Mexico brings deadly secrets back to the surface. Stories of piracy, war, slavery and a dinosaur-killing asteroid are r
3. S01E03Lost Worlds of the MediterraneanJune 11, 2018 6.5The secrets of lost ancient civilizations come to light when the Mediterranean is drained.
4. S01E04Sunken TreasuresJune 18, 2018 6.0Treasure hunting has captured our imaginations for centuries. Draining the oceans reveals the richest wrecks ever found.
5. S01E05Legends of AtlantisJune 25, 2018 6.3Exciting evidence emerges of civilizations lost under the waves. But are these ancient cities the long sought-after Atlantis or accidents of
6. S01E06Deadly PacificJuly 2, 2018 6.5The Ring of Fire is an area in the Pacific Ocean where volcanoes, earthquakes and tsunamis form; the ocean is drained to reveal the geologic
7. S01E07Egypt's Lost WondersJuly 9, 2018 7.0The Nile was central to ancient Egypt. Draining its water reveals a lost wonder and the origins of the Egyptians’ obsession with the afterli
8. S01E08Mysteries of the China SeasJuly 16, 2018 7.0The China seas are the most fiercely contested and mysterious waters on the planet. We expose the remains of the biggest battleship ever put
9. S01E09Ultimate BattleshipsJuly 23, 2018 6.5The hidden secrets of WWI's powerful weapons are revealed by draining the North Sea.
10. S01E10Malaysia Airlines 370July 30, 2018 5.5Where is Malaysian Airlines flight MH370? CGI reconstruction reveals the challenges of locating an aircraft that goes missing in the deep oc

Season 1 ranked & reviewed

1. S02E01Secrets of D-DayJune 3, 2019 6.5In the greatest amphibious invasion fleet ever assembled, 7,000 vessels and 250,000 men take the Nazis by surprise. By draining the ocean, w
2. S02E02Secrets of New York CityJune 10, 2019 6.0In just 400 years New York has become a global powerhouse. By draining the ocean, revealing submerged shipwrecks and subterranean secrets, w
3. S02E03Killer U-BoatsJune 17, 2019 6.5Draining the oceans reveals the story of the U-Boats as they took on the Royal Navy, sinking 12 million tons of ships and nearly winning the
4. S02E04Buried Secrets of the Gold RushJuly 1, 2019 5.5Winners took all in the race to get rich in the California and Klondike gold rushes; unearthing the ships involved reveals the risks taken t
5. S02E05Secrets of the Civil WarJuly 22, 2019 7.0Throughout the American Civil War, technological advances fuelled an arms race on America’s seas and rivers. Science and graphics drain the
6. S02E06Lost Nukes of The Cold WarJuly 29, 2019 6.0When the world’s two greatest superpowers vie for supremacy, they spur extraordinary advances in military technology.
7. S02E07Secrets of The Spanish ArmadaAugust 5, 2019 6.5Spain’s attempted conquest of England fails when its armada is defeated. Draining the ocean reveals how the English stole technology to buil
8. S02E08Pacific War MegawrecksAugust 12, 2019 6.0An expedition searches for the iconic wrecks of the Battle of the Pacific, including the ship that delivered the Hiroshima bomb, the USS Ind
9. S02E09Thai Cave RescueSeptember 2, 2019 5.0Drain the Oceans conducts the first accurate 3D survey of the Thai cave, revealing insight into the risky mission to save 12 boys from the f
10. S02E10Season's bestLondon's Secret HistorySeptember 9, 2019 8.0London is one of the most powerful cities on Earth. Drain the Oceans reveals the story of the city’s meteoric rise.
11. S02E11Secrets of Loch NessSeptember 16, 2019 5.5Combining over 100 years of data with military-grade scanning equipment, Drain the Oceans pulls the plug on the world’s most famous lake to
12. S02E12Hitler's Killer WarshipsSeptember 23, 2019 6.0The story of Hitler’s vision to conquer the world using his high-tech battleships, revealing the rise and fall of the Third Reich’s deadly f
13. S02E13Lost GiantsSeptember 30, 2019 6.0Over the past century, advances in technology have fueled a race to build gigantic ships. When things go wrong, they become awe-inspiring wr
14. S02E14Pacific ShockwaveOctober 7, 2019 6.0In 1942, Japan came to dominate the Pacific region. The secret as to how they did it lies waiting to be discovered.
15. S02E15Rise of The Roman EmpireOctober 14, 2019 6.3The secrets of the survival of the Roman empire are unearthed from beneath the waves of the Mediterranean and the soil of the Italian penins

Season 2 ranked & reviewed

1. S03E01The Atomic Ghost FleetMay 5, 2020 5.5The dark secrets of U.S. nuclear tests at Bikini Atoll.
2. S03E02Season's bestThe Viking SeasMay 5, 2020 6.3A formidable battleship reveals secrets, 450 years later.
3. S03E03Egypt's Sunken CityMay 12, 2020 6.0A lost Egyptian city gives up its secrets after 2,000 years.
4. S03E04The Battle of BritainMay 19, 2020 6.0Uncovered wrecks reveal how Britain defeated the Nazis.
5. S03E05Pirate Ships of the CaribbeanMay 26, 2020 6.0Shipwrecks reveal the true story of piracy on the Caribbean.
6. S03E06The American RevolutionJune 2, 2020 5.5Revealing forgotten stories from the American Revolution.
7. S03E07Raiders of the Civil WarJune 9, 2020 6.0Revealing the lost wrecks of the American Civil War.
8. S03E08The Last Wrecks of WWIIJune 16, 2020 6.0New insights reveal how the Allies won World War II.
9. S03E09ChicagoJune 23, 2020 5.7Chicago's past emerges from the waters of Lake Michigan.
10. S03E10America's Last Slave ShipOctober 18, 2020 6.3Maritime archaeologists and historians go in search of the crucial component in the Atlantic Slave Trade: the slave ship. An armoured, float

Season 3 ranked & reviewed

1. S04E01The Wild WestAugust 2, 2021 5.5Uncovered clues from a famous Montana battleground, a 19th-century steamboat and a frontier ghost town reveal surprising truths about the Wi
2. S04E02Season's bestThe Battle for the Black SwanAugust 2, 2021 6.2Archaeologists and treasure hunters battle it out over half a billion dollars worth of gold and silver. Who will win the Battle for the Blac
3. S04E03HollywoodAugust 9, 2021 5.5From a buried film set to a WW1 Navy ship and old fishing barge, we discover the role these ruins played in Hollywood movie-making history.
4. S04E04The First AmericansAugust 9, 2021 5.5Clues from a 13,000-year-old skeleton and a submerged coastline reveal surprising insights about the first humans to arrive in the Americas.
5. S04E05Venice's Lost EmpireAugust 9, 2021 5.5A 14th-century galley entombed in mud, a 16th-century hoard of luxury cargo, and a gruesome discovery reveal the rise and fall of the Veneti
6. S04E06Hurricane ApocalypseAugust 17, 2021 5.5Remnants of colonization attempts, a revolutionary refugee ship and submerged subway cars reveal hurricanes' impacts on America's past and i
7. S04E07The Great Barrier ReefAugust 23, 2021 5.5The mysterious sinking of Australia’s “Titanic”, a warship on a dangerous mission, and a ROV expedition searching for clues at the bottom of
8. S04E08Sea of SecretsAugust 23, 2021 6.0The Black Sea is a place of myth and legend and ships have sailed on its waters for millennia. Three wrecks unlock secrets of this mysteriou

Season 4 ranked & reviewed

1. S05E01Season's bestThe Secrets of Pompeii's DeadNovember 14, 2022 6.0Through digital re-creations, scientists uncover mysteries from the bottom of the ocean.
2. S05E02The Amber RoomNovember 21, 2022 6.0The discovery of a wreck in the Baltic Sea leads to a treasure hunt, but what they find is even more precious: the story of Germany’s Dunkir
3. S05E03Pearl HarborNovember 28, 2022 5.5Draining Hawaii reveals Japan’s secret weapons, from mini subs to fighter planes, with the wreck of USS Arizona serving as a reminder of the
4. S05E04The AlamoDecember 5, 2022 5.0Drowned shipwrecks and lost battlefields reveal secrets of America’s most famous siege and tell how Texas, against all odds, secured its ind
5. S05E05Maya CollapseDecember 11, 2022 6.0New discoveries made at a lost city and a tale of human sacrifice offer a new insight into the rise and fall of the ancient Maya.
6. S05E06NarcosDecember 19, 2022 5.0With real-time access to a US border security team, discover the extraordinary story of how Mexican cartels have smuggled cockiness into the

Season 5 ranked & reviewed

1. S06E01AlaskaMarch 5, 2023 5.7Revealing the graveyard of a fleet.
2. S06E02Rise of the MobMarch 12, 2023 6.3How the mob gained power and wealth in 1920s America.
3. S06E03Season's bestSecrets of the DinosaursMarch 19, 2023 6.7Paleontologists uncover the Real Jurassic Americas.
4. S06E04The Myth of the Pacific Pirate ShipMarch 26, 2023 6.0The truth behind the legend of a pirate ship.
5. S06E05Invasion USAApril 2, 2023 5.7The British burning of the White House in 1814.
6. S06E06$20 Million Time BombApril 9, 2023 6.0Thwarting a $20 million time bomb murder and insurance scam.

Season 6 ranked & reviewed