Ed Stoppard
Alan Turing
Acting
Henry Goodman
Franz Greenbaum
Acting
Paul McGann
Himself - Narrator (voice)
Acting
Asa Briggs
Himself - Codebreaker, Bletchley Park
Acting
Jean Valentine
Herself - WRNS and Bombe Operator, Bletchley Park
Acting
David Leavitt
Himself - Alan Turing's Biographer
Writing
Rolf Noskwith
Himself - Codebreaker, Bletchley Park
Acting
Dermot Turing
Himself - Alan Turing's Nephew
Acting
Christopher Morcom
Himself - Christopher Morcom's Nephew (as Christopher Morcom QC)
Acting
Ian Stewart
Himself - University of Warwick (as Professor Ian Stewart)
Acting