The Keys to the Reich

This episode covers the early allied efforts at cracking the German Enigma system, the establishment of Station X at Bletchley Park and the gathering of the eclectic group of geniuses who were to break the "unbreakable" German Enigma encryption system. The programme gives insight into the inner-workings of the Enigma machine, and the manner in which Bletchley's brilliant boffins managed to outsmart it.