Based on the real life story of legendary cryptanalyst Alan Turing, the film portrays the nail-biting race against time by Turing and his brilliant team of code-breakers at Britain's top-secret Government Code and Cypher School at Bletchley Park, during the darkest days of World War II.


Rory Kinnear
Detective Robert Nock

Allen Leech
John Cairncross

Matthew Beard
Peter Hilton

Charles Dance
Commander Denniston

Mark Strong
Stewart Menzies