Keira Knightley Joan Clarke
Charles Dance Commander Denniston
Benedict Cumberbatch Alan Turing
Matthew Goode Hugh Alexander
Mark Strong Stewart Menzies
Alex Lawther Young Alan Turing
Steven Waddington Superintendent Smith
Tuppence Middleton Helen
Denise Kum Makeup Artist
Allen Leech John Cairncross
Rory Kinnear Detective Robert Nock
Gary Hutchings Key Grip
Tom Goodman-Hill Sergeant Staehl
Beverly Winston Script Supervisor
James Northcote Jack Good
Andrew Havill Teacher
Graham Moore Screenplay, Executive Producer
Jack Bannon Christopher Morcom
Nina Gold Casting
Steven Hall Second Unit Director of Photography
Martin Jensen Sound Re-Recording Mixer
Matthew Beard Peter Hilton
Eran Barnea Visual Effects Supervisor
Peter Heslop Co-Producer
Mark Underwood Crossword Man (uncredited)
Victoria Wicks Joan's Mother
Alexandre Desplat Original Music Composer
Stuart Matthews Bletchley Park Operative (uncredited)
Morten Tyldum Director
Joshua Wichard German Spy Plane Pilot (uncredited)
John Midgley Sound Recordist
Jack English Still Photographer
Tim Steed Electrical Assistant
Jack Tarlton Charles Richards
Peter Burgis Foley
Joseph Oliveira MI6 Agent (uncredited)
Rebecca Milton Art Direction
Levan Doran Stunts
Teddy Schwarzman Producer
Will Bowden Military Policeman
William Goldenberg Editor
Angela Barson Visual Effects Supervisor
James G. Nunn Sherborne Student 2
Jonathan Collard Digital Intermediate
Nick Dent Supervising Art Director
Andy Kennedy Sound Designer
Maria Djurkovic Production Design
Nicholas Blatt Ministry Man (uncredited)
Grace Calder Assistant Wren (uncredited)
Marc Gómez del Moral "B" Camera Operator
Dan Green Dialogue Editor
Peter Wignall Steadicam Operator
Stuart Hilliker Sound Re-Recording Mixer
Sammy Sheldon Costume Design
Ilan Goodman Keith Furman
Miranda Bell Margaret
Phil Booth First Assistant Director
David Charkham Joan's Father
Dennis Good Civilian (uncredited)
Daniel Chapple MI6 Agent (uncredited)
Ancuta Breaban Wren (uncredited)
Lauren Briggs-Miller Assistant Art Director
Tim van Eyken MI6 Agent
James Manning Second Assistant Director
Lucy Ainsworth-Taylor Visual Effects Producer
Joe Beal Sound Effects Editor
Marco Anton Restivo Art Direction
Leigh Dent Passerby (uncredited)
Óscar Faura Director of Photography
Rory Moles First Assistant "B" Camera
Hayley Joanne Bacon Woman in Crowd (uncredited)
David G. Robinson Police Sergeant White (uncredited)