Captain Cousteau and the crew of Calypso search the Aegean Sea for the wreck of the Britannic, sister ship to the ill-fated Titanic. How the Britannic, which was pressed into service as a hospital ship during the First World War, sank - whether by mine or torpedo - was still a mystery.
Cousteau talks to some of the survivors and takes one of them, 86-year-old Mrs Macbeth Mitchell of Edinburgh, who was a young nurse on the ship, to revisit the wrecked Britannic in the diving saucer. What she and the crew of Calypso discover in the depths of the sea helps to solve this 62-year-old mystery.
BBC Bristol. Preview: p 15