Normally I agree about fictional entertainment... but this is one of those stories that rarely gets told outside of books that nobody but historians read, and the whole effort had a huge effect on the shifting of the war and particularly the safety of Allied ships at sea. In fact, the program was almost too successful- we were decrypting almost every piece of German intelligence by the end of 1944 (and Japanese intelligence as well, the Germans shared Enigma with them) that we almost had too much data to act on. Large pieces of relevant information were missed because allied commanders were just buried in decoded material.
