Britain's Greatest Codebreaker

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