Benedict Cumberbatch Alan Turing
Charles Dance Commander Denniston
Keira Knightley Joan Clarke
Matthew Goode Hugh Alexander
Rory Kinnear Detective Robert Nock
Mark Strong Stewart Menzies
Tuppence Middleton Helen
Alex Lawther Young Alan Turing
Allen Leech John Cairncross
Morten Tyldum Director
Tom Goodman-Hill Sergeant Staehl
Andrew Havill Teacher
Jack Bannon Christopher Morcom
Steven Waddington Superintendent Smith
Alexandre Desplat Original Music Composer
Nina Gold Casting
Victoria Wicks Joan's Mother
Levan Doran Stunts
Matthew Beard Peter Hilton
Joseph Oliveira MI6 Agent (uncredited)
Matt Curtis Title Designer
James Northcote Jack Good
Grace Calder Assistant Wren (uncredited)
Katie Anna Brady VFX Artist
William Goldenberg Editor
Tim Steed Electrical Assistant
Chris Lyons Special Effects Makeup Artist
Dominic Charman Sherborne Student 1
Rory Moles First Assistant "B" Camera
Peter Heslop Co-Producer
James G. Nunn Sherborne Student 2
Graham Moore Executive Producer, Writer
Miranda Bell Margaret
Angela Barson Visual Effects Supervisor
Óscar Faura Director of Photography
James Manning Second Assistant Director
Peter Burgis Foley
Will Bowden Military Policeman
Kirsty Whalley Music Editor
Andy Kennedy Sound Designer
Jack Tarlton Charles Richards
Joshua Wichard German Spy Plane Pilot (uncredited)
Teddy Schwarzman Producer
Marc Gómez del Moral "B" Camera Operator
Sarah Shepherd Dialect Coach
Lucy Ainsworth-Taylor Visual Effects Producer
Martin Jensen Sound Re-Recording Mixer
Lee Walpole Supervising Sound Editor
John Midgley Sound Recordist
Nick Dent Supervising Art Director
Tatiana Macdonald Set Decoration
Phil Booth First Assistant Director
Dennis Good Civilian (uncredited)
Mark Underwood Crossword Man (uncredited)
Marco Anton Restivo Art Direction
Ancuta Breaban Wren (uncredited)
Gary Hutchings Key Grip
Stuart Hilliker Sound Re-Recording Mixer
Tim van Eyken MI6 Agent
Jack English Still Photographer
Denise Kum Makeup Artist
Charlie Manton Sherborne Student 3
Roo Maurice Makeup Artist
Maria Djurkovic Production Design
Stuart Matthews Bletchley Park Operative (uncredited)
Laurence Kennedy Headmaster
Charis Theobald Graphic Designer
David Charkham Joan's Father
Nicola-Jayne Wells First Aid Nurse (uncredited)
Eran Barnea Visual Effects Supervisor
Sammy Sheldon Costume Design
Richard George Location Manager