An emotionally fragile code-breaker is called back to the scene of his mental breakdown when the Enigma machine fails to crack the new German code. However, these U-boat cryptograms are not the ...

During the heart of World War II, in March of 1943, cryptoanalysts at Britain's code-breaking center have discovered to their horror that Nazi U-boats have changed their Enigma Code. Authorities ...

The best secrets are the hardest to find.