In the midst of the numerous “based on real events” films this year, there are remarkably few that take a radical approach to the subject in the way that a few years ago I’m Not There did with Bob Dylan. That film was an impressionistic multi-faceted portrait, with several different actors playing Dylan at various stages of his musical evolution. Occasionally puzzling, it was also illuminating. The Imitation Game takes a more conventional approach to the story of an equally exceptional individual – Alan Turing, the intellectual begetter of the modern computer. Although the narrative is occasionally spliced with childhood incidents or later developments, it is largely concerned with Turing’s time at Bletchley Park during the Second World War. There, he and a t