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