The German battleship Bismarck sailed in 1941 as the pride of the Kriegsmarine, and this film reconstructs the ten-day chase that ended in her destruction. Presenter Dan Snow works through the operation with naval historian Nick Hewitt, National Maritime Museum curator Andrew Choong, and Angus Konstam, author of 'Hunt the Bismarck', covering the sinking of HMS Hood, the torpedo strike that crippled Bismarck's rudder, and the final barrage from the Royal Navy that sent her down in the North Atlantic. Archival photographs, ship diagrams, and maps trace the pursuit across the sea lanes, while the historians dig into the tactical decisions on both sides, from Admiral Lütjens' course choices to the British fleet's coordination problems. The film also weighs the long-running argument over whether Bismarck was scuttled by her own crew or sunk outright by British guns and torpedoes, using wreck evidence and survivor accounts to test both claims. It is a detailed, expert-driven account rather than a dramatized retelling.