Director: Morten Tyldum (2014)
Get quizzical with Benedict Cumberbatch in this compelling wartime thriller about real-life code-breakers.
It unlocked the Nazi‘s Enigma code machine and so helped win the second world war – but he was later prosecuted for being gay.
A cleverly constructed narrative switches between between his arrest in 1951, unhappy schooldays and successful war years.
Although prodigiously brilliant, Turing’s lack of social graces annoys everyone but Joan, the only female team member played by a winning Keira Knightley.
In a laboratory in Bletchely Park they try to decipher German communications before the daily code is changed.
There are over 159 million million possible combinations and every seconds delay means more Allied deaths.
So starts to Turing build his computer, an astonishing room-sized contraption of wires, wheels and whirligigs.
He nicknames it Christopher after a schoolfriend, a perfect name for anything super-intelligent but he’s unable make it work quickly enough.
Denniston wants to close the laboratory down and the paranoid atmosphere is heightened by the possible presence of a spy.
Despite saving an estimated 14 million lives and shortening the war by two years, his work is classified top secret.
So no-one is aware of his work when he is later tried and punished for indecent behaviour.
This excellent film is an insufficient legacy to a genius and British hero – but it’s a damn fine place to start.