Turing’s long shadow

As a young student, the atheist Alan Turing — disorientated with grief over the death of his first love Christopher Morcom — wrote to Morcom’s mother with an atomic theory of how one’s spirit might transmigrate. Years later, he brought the modern computer age into being by positing machines imbued with consciousness. You can’t help wondering what Turing’s shade — whether ethereal or perhaps digital — makes of his posthumous fame. Plays; books; postage stamps. Now, following Benedict Cumberbatch’s doomy big-screen portrayal of the Bletchley Park codebreaking genius in The Imitation Game, David Lagercrantz fictionalises the murky aftermath of Turing’s death. In doing so, he explores questions not only of identity and maths and philosophy, but also of good taste. Turing took his own life, after all: is it quite seemly to turn this into noirish entertainment?