The story of the longest battle of the Second World War.

The critical moments in the biggest naval campaign of the 20th Century. Powerful firsthand testimony of those who fought in the battle is combined with dramatic archival material, bringing the horrors and heroism of the Battle of the Atlantic to a new generation.

This series breathes new life into this crucial piece of history, revealing never before seen drama on the high seas of the Atlantic.

“During the war only one thing ever frightened me - the U boat peril. Battles might be won or lost but our power to fight and keep ourselves alive rested on our struggle to keep control of the Atlantic.” Sir Winston Churchill