Moins connu qu'Alan Turin, Gordon Welchman, autre casseur de codes pendant la Seconde Guerre mondiale, a lui aussi contribué à la chute du régime nazi.
Steven Mackintosh
Himself - Narrator
Brian Deacon
Gordon Welchman (voice)
Rosamund Welchman
Herself - Gordon Welchman's Daughter
W. Gordon Welchman
Himself - Ex-Head of Hut 6, Bletchley Park (1939-1941) (archive footage)
Sinclair McKay
Himself - Author, 'The Secret Life of Bletchley Park'
Jimmy Thirsk
Himself - Veteran, Hut 6
Asa Briggs
Jane Fawcett
Herself - Veteran, Hut 6
Tony Comer
Himself - GCHQ Historian and Former Analyst
John Naughton
Himself - Vice President, Wolfson College, Cambridge (as Prof John Naughton)
John Scarlett
Himself - Chairman, Bletchley Park Trust, and Former Chief, MI6 (as Sir John Scarlett KCMG OBE)
Jennifer Welchman
Herself - Gordon Welchman's Granddaughter
Robert R. Everett
Himself - Former President, The MITRE Corporation
Eric Ellingson
Himself - Gordon Welchman's Colleague
Larry Hill
Keith Richards: Under the Influence
The Dark Knight Rises
Avengers : L'Ère d'Ultron
Whiplash
Une merveilleuse histoire du temps
L'Empire contre-attaque
Le Hobbit : La Bataille des cinq armées
Star Wars : Le Réveil de la Force
Inception
Avengers : Infinity War
Interstellar
Fight Club
Wonder Woman
Le Flingueur
Le Hobbit : Un voyage inattendu
Indiana Jones et le royaume du crâne de cristal
Premier Contact
La Guerre des étoiles
Minority Report
Forrest Gump