I would recommend to all those who want to have a better understanding of Turing's role in defeating the Nazi Germany and the Axis powers, a brilliant book by Neal Stephenson - Cryptonomicon. Turing, disguised in the novel as Waterhouse, is the BRAIN that helps to outwit the German war machine. The book, making a great reading, IMHO perfectly describes Turing's life. When I first read it 6 years ago, I had no idea he was treated like a criminal in his own country, instead of being knighted or otherwise rewarded for his role in WWII. Indeed, the news about his being pardonned now were a shock to me.
As a side note, those who read Tinker, Tailor, Soldier, Spy by John le Carre would probably recall, that in the "intelligence" community routine interventions, called terminations, are just one of the basic ways of ending an agent's employment.