保罗·麦甘
饰 Himself - Narrator (voice)
Asa Briggs
饰 Himself - Codebreaker, Bletchley Park
Jean Valentine
饰 Herself - WRNS and Bombe Operator, Bletchley Park
David Leavitt
饰 Himself - Alan Turing's Biographer
Rolf Noskwith
饰 Himself - Codebreaker, Bletchley Park
Dermot Turing
饰 Himself - Alan Turing's Nephew
Christopher Morcom
饰 Himself - Christopher Morcom's Nephew (as Christopher Morcom QC)
Ian Stewart
饰 Himself - University of Warwick (as Professor Ian Stewart)
