The mystery surrounding the sinking of the M1. The submarine was considered the most advanced of its time but went missing with its crew of 69 on a routine training exercise in the English Channel in 1925. Now, diver and researcher Richard Larn believes he may have uncovered the wreck and hopes to discover its secrets
A hurricane uncovers a 300-year-old wreck off the coast of North Carolina, prompting an investigation into the legend of Blackbeard. The infamous pirate was a skilled self-publicist, but the discovery of his ship Queen Anne's Revenge may help to reveal the truth behind his brutal image
Marine archaeologist Peter Gesner, helped by a team of wreck-divers and archivists, attempts to uncover the secrets of HMS Pandora, a ship which sank off the coast of Australia in 1791 while returning from a mission to capture the mutineers of the HMS Bounty
Dr Colin Martin explores the mystery surrounding the wreck of one of Oliver Cromwell's warships which was sent to attack the Scottish Royalist stronghold of Duart Castle in 1653, but did not survive the mission
American adventurer Barry Clifford investigates the fate of a French fleet that disappeared off the coast of Venezuela more than 300 years ago. According to reports, the ships were smashed to pieces on a notorious reef with the loss of 1,000 lives, resulting in a serious blow to French sea power in the region
Fearless adventurer Steve Sargison takes up the challenge of a lifetime as he sets out to locate a wreck lying in clear Philippine waters that is said to be laden with gold. Rumours abound that the craft is haunted and, if that doesn't deter him, he should remember the dive has already claimed the lives of three other underwater prospectors
An examination of undersea evidence suggesting the Allies' secret weapon - tanks fitted with flotation devices - failed, costing the lives of thousands of American soldiers, even though the same plan had succeeded for British troops. Survivors of the conflict tell their stories, interspersed with reconstructions and photographic evidence
US divers battle time and tide to salvage the revolving gun turret of the Monitor, a ship commissioned by Abraham Lincoln in the American Civil War. Built and designed by a genius, the revolutionary vessel was iron-clad and possessed the world's first revolving gun turret. The race is now on to raise this extraordinary piece of history before the sea claims her forever