The true story of Bletchley Park is more incredible than fiction. In a desperate race against time, the WW2 code breakers' mission was to crack the German Enigma machine and decode other seemingly unbreakable messages. Their reward? 'Ultra' Intelligence that saved the Allied convoys carrying essential supplies from U Boat wolf packs, which were continuously on the prowl. Bletchley Park was Churchill's Secret Passion and he referred to the code breakers as "the geese that laid the golden eggs and never cackled".