Breaking the Codes

The beginning of modern code-breaking following the creation of a special unit by the British Royal Navy in 1914.

Using rare archive footage and exclusive interviews to document the rise of the code breakers, highlighting the war that involved the brilliant skills of mathematicians and chess players.

Cracking Japanese codes; Japan develops a code-making machine.

The Battle of Midway, fought in World War II, took place on June 5, 1942. The United States Navy defeated a Japanese attack against Midway Atoll, marking a turning point in the war in the Pacific theater, The American code breakers worked to decrypt the complex Japanese ciphers. It was a game of chess to anticipate the enemy's next move.

This episode concentrates on the work of the code breaking activities of the secret Bletchley Park, Station X, which the British code breakers occupied in attempting to crack the complex German enigma codes.

Battle of the Atlantic covers the American and British efforts who were trying to protect their convoys bringing supplies and munitions to Europe from attack by the German U-boat Wolfpacks. The British and American code breakers worked tirelessly to break the German codes to track their U-Boat movements.