Groundbreaking documentary which follows a Japanese-led team of scientists as they attempt to shed light on the mysterious world of deep sea sharks. Only 50 specimens of the newly discovered 'megamouth' have ever been sighted. Over four years, scientists and film crews voyaged in midget submarines into the depths of Suruga Bay and Sagami Bay to film them. Prehistoric 'living fossil' sharks such as bluntnose sixgill sharks, goblin sharks and frilled sharks also lurk in the depths. As part of the investigation, a sperm whale carcass was placed at the bottom of the sea to attract these sharks, which were then studied and observed from the submersible vessels. Revealing in detail the previously unknown behaviour of deep sea sharks, the film unravels another of the intriguing mysteries of our planet's biodiversity.

A young man's dramatic rescue at sea spirals into accusations he murdered two members of his wealthy New England family.

A journey into the extraordinary life and legacy of pioneering marine biologist Edie Widder.

OceanGate's Titan tourist submersible imploded in 2023 on a deep-sea dive to the Titanic. This documentary details how a bold vision ended in tragedy.

How Stockton Rush's deadly dive to the fabled Titanic wreckage in the Titan submersible became a cautionary tale about the risks of innovation.

Exploring an unknown world 10,000 m beneath the waves. After capturing a giant squid on film, NHK's deep-sea film crew explores our planet's deepest point The Mariana Trench is nearly 7 miles deep. The water pressure is immense, and it's a world that's long been out of our reach. What creatures could survive such hostile conditions? This is an expedition to explore the earth's deepest frontier. Narrated By David Attenborough.

A wine documentary exploring the most suitable types of wine in extreme environments for the future of tourism. Episode 1 follows sommelier Bojan Radulovic and the deepest professional wine tasting ever attempted at -300m in a submersible.

14 September 1943: The legendary submarine Y1 “Katsonis” was sunk north of the island of Skiathos by the German submarine chaser UJ 2101. Through the book of XO Elias Tsoukalas who escaped capture and had to swim for nine hours to reach shore, secret documents, and crew members’ diaries, the documentary unfolds the human stories woven around the submarine. Seventy-five years later, with the support of the Hellenic Navy, we search for the submarine sunk at 253 metres depth and film the wreck for the very first time.

A Titanic dive. A fatal implosion. Five lives lost. As the world watched, investigators raced to uncover the truth behind the disaster. But was this more than a tragic accident?

For nearly seventy years the fate of the lost Nazi submarine U-745 remained a mystery. After a decade of painstaking research and exploration, a Finnish diving team has finally solved the riddle.

In 1968 the Soviet ballistic missile submarine K-129 sank in the Central North Pacific. American intelligence located it within weeks of its demise. The CIA crafted a secret program to raise the submarine in 1974. Now after much secrecy, this story can be told, by the men who made it happen and with never-before-seen footage of the actual salvage attempt, and new evidence of the project's successes and failures.

Documentary about the Swedish submarine Ulven which was sunk by a mine in Swedish waters in 1943 killing all 33 crew members.