Watch: the first trailer for The Imitation Game, with Benedict Cumberbatch as Alan Turing

The biopic of the Second World War code-breaker later convicted for homosexuality also stars Mark Strong, Rory Kinnear and Keira Knightley
 The first trailer for the Alan Turing biopic The Imitation Game, starring Benedict Cumberbatch as the Second World War code-breaker, has been released. Norwegian director Morten Tyldum's film, based on Andrew Hodges's book Alan Turing: The Enigma, has been selected to open this year's London Film Festival on October 8.