I recently saw this film, which is based on the life and exploits of the mathematician, codebreaker, and computer science pioneer Alan Turing. It is very well acted and definitely worth seeing; it’s good for more people to become familiar with Turing’s story and the accomplishments of the Bletchley Park codebreakers. HOWEVER, the extremely negative portrayal of Commander Alastair Denniston, who ran BP, seems to have little basis in fact. Denniston was a real person, and his family is understandably upset at the way he was misrepresented in the film. Dramatic license is one thing, but if you want a villain, then make one up; don’t turn a real historical non-villainous individual into one. There have been several articles in the UK press lately about the film and its portrayal of various individuals, especially Denniston:
The film also could have done a better job at giving credit to the Polish mathematicians who pioneered machine methods of codebreaking, before WWII began. Also, the film gives the impression that Turing’s friend Joan Clark was the only female codebreaker at Bletchley…this is not true, a very large number of women worked at BP, and some of them were in professional codebreaking roles. One of these women was Mavis Lever; I excerpted some of her writing about BP at my 2007 post the Bombe runs again. And it seems that the real Alan Turing, while he definitely came across as a bit of an odd duck, was more likeable than he is (at least initially) portrayed in the film; he has been called “a very easily approachable man” who did in fact have a sense of humor. There’s a bit too much of “standard character type 21037–eccentric genius” in this version of Turing.
The above critiques to the contrary, though, you should definitely see the film. It does a good job of maintaining interest, even for those like myself who are already pretty familiar with the history The filmmakers could have avoided the above problems without harming the film’s impact as drama; indeed, I think there are accuracy-related changes that could have made the film more rather than less dramatic.
This article compares several of the fictionalized Bletchley Park individuals with the real-life counterparts. And this piece, by a woman who has spent a lot of time studying Turing and BP, is focused particularly on the character of Turing in real life versus in the film. Probably makes most sense to see the movie first and then read these links for additional perspective.