I really like the four-part documentary series called "Staion X" which was all about Bletchly Park. It has numerous interviews with the folks that worked there -- they were a bunch of excellent oddballs, for sure.
It's a really fascinating perspective on WWII and how crap Monty was at being a general; he was reading the Germans' messages and still couldn't defeat Rommel. Only when the Med fleet intercepted and sank all his resupply ships did Rommel's crew finally lose.
The Germans' overconfidence in the Enigma machine was a big part of their downfall, especially once America's resources came to bear. Of course, that's what they deserved for having a leader speedballing meth and morphine.
All that said, the interesting historical twist is that no WWII history before the 1970s is accurate because all the Bletchly work was completely classified until one of their officers wrote a book about it. They cover that in the documentaries, too. There were men and women who had never told their families about what they did during the war, until the news finally broke. One mentioned how her daughter wondered why her mom knew that 'M' was the 13th letter.
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