World's Greatest Shipwrecks

Research teams win special permission to investigate two wrecks from World War One lost in the Orkney islands, the warships HMS Hampshire and HMS Vanguard

The story of two of the greatest failed invasions in naval warfare - the defeat of the Spanish Armada, and the catastrophe of the Dardanelles in 1915

The stories behind two sunken ocean liners a century apart - the Empress of Ireland, which sank in heavy fog in 1914, and El Faro, which was struck by a tropical storm in 2015.

The discovery of three German U-boat wrecks including the world's first ever stealth sub, reveals dramatic stories of conflict at sea.

The fate of German armed military transport ship MV Wilhelm Gustloff, which was sunk in January 1945 by Soviet submarine S-13 in the Baltic Sea while evacuating German civilian refugees. Plus, the attack on Japan's naval base at Micronesia's Chuuk Lagoon in February 1944.

A unique survey of Bikini Atoll, including previously unseen footage and exclusive 3D scanning of the most important wrecks left behind by the US military's huge nuclear war games of the late 1940s.

The matter of toxic wrecks around the world from the Second World War, as 80 years later vessels are disintegrating and spilling their toxic loads out into the open sea. A sunken oil tanker with a paper-thin hull is on the verge of creating a huge oil slick contaminating Scandinavian beaches, while in the Thames Estuary, an American ammunition ship is a ticking time bomb.

A look back at a time when battleships ruled the waves - huge monsters of steel, costing millions and protected by massive belts of armour. The advent of the aeroplane with small low-cost weaponry that could only not disable these leviathans but sink them altogether meant that suddenly these giant weapons of war were vulnerable in a way never predicted by their original designers. This programme recalls the loss of HMS Hood and Bismarck, the attack on Pearl Harbor, and the sinking of the HMS Prince of Wales.

A gripping account of the mysterious collision between celebrated ocean liner the Queen Mary and the light cruiser HMS Curacoa in 1942