Henry GoodmanFranz Greenbaum Paul McGannHimself - Narrator (voice) Asa BriggsHimself - Codebreaker, Bletchley Park Jean ValentineHerself - WRNS and Bombe Operator, Bletchley Park David LeavittHimself - Alan Turing's Biographer Rolf NoskwithHimself - Codebreaker, Bletchley Park Dermot TuringHimself - Alan Turing's Nephew Chris MorcomHimself - Christopher Morcom's Nephew (as Christopher Morcom QC) Ian StewartHimself - University of Warwick (as Professor Ian Stewart) Andy JacksonDirector Of Photography Rob GoldieDirector Of Photography 
