Adapted from the novel by Robert Harris this is a routine war drama set at Bletchley Park the now famous centre of British code breaking. Unlike The Imitation Game (2014) this is not a story that attempts to tell a history, the story is a work of fiction with the odd very loose reference to real people. The story here is that the Germans have sneakily changed their codes and Tom (Dougray Scott), a maths genius who broke their codes before, is hastily summonsed back to Bletchley. He isn't well thought of by the top brass as he had an emotional meltdown over his obsessive love for Claire (Saffron Burrows), who has since disappeared. Along with her roommate, Hester (Kate Winslet) he sets out to find her as he believes she may have been spying. This leads to lots of emotional chases and daft plot twists in a mediocre espionage story that fails to really get going. Good support cast that includes Tom Hollander and Jeremy Northam amongst others but they don't make up for an average and silly story.