Keira Knightley Joan Clarke
Matthew Goode Hugh Alexander
Benedict Cumberbatch Alan Turing
Allen Leech John Cairncross
Charles Dance Commander Denniston
Mark Strong Stewart Menzies
Tuppence Middleton Helen
Alex Lawther Young Alan Turing
Rory Kinnear Detective Robert Nock
Miranda Bell Margaret
Steven Waddington Superintendent Smith
Jack English Still Photographer
Tom Goodman-Hill Sergeant Staehl
Matthew Beard Peter Hilton
John Midgley Sound Recordist
Tim van Eyken MI6 Agent
Óscar Faura Director of Photography
Morten Tyldum Director
Tim Steed Electrical Assistant
Denise Kum Makeup Artist
Gary Hutchings Key Grip
Jack Bannon Christopher Morcom
William Goldenberg Editor
Nina Gold Casting
Will Bowden Military Policeman
Andrew Havill Teacher
Alexander Cooper Bletchley Park Agent (uncredited)
Grace Calder Assistant Wren (uncredited)
Matt Curtis Title Designer
James Northcote Jack Good
Peter Heslop Co-Producer
Victoria Wicks Joan's Mother
Lucy Ainsworth-Taylor Visual Effects Producer
Martin Jensen Sound Re-Recording Mixer
Rebecca Milton Art Direction
Peter Burgis Foley
Levan Doran Stunts
Nick Thomas Property Master
James Manning Second Assistant Director
Alexandre Desplat Original Music Composer
Teddy Schwarzman Producer
Joseph Oliveira MI6 Agent (uncredited)
Andy Kennedy Sound Designer
Dennis Good Civilian (uncredited)
Graham Moore Screenplay, Executive Producer
Angela Barson Visual Effects Supervisor
Peter Wignall Steadicam Operator
Mark Underwood Crossword Man (uncredited)
Nick Dent Supervising Art Director
Marco Anton Restivo Art Direction
Rory Moles First Assistant "B" Camera
Phil Booth First Assistant Director
Sammy Sheldon Costume Design
Richard George Location Manager
Lauren Briggs-Miller Assistant Art Director
Jack Tarlton Charles Richards
Katie Anna Brady VFX Artist
Roo Maurice Makeup Artist
Joshua Wichard German Spy Plane Pilot (uncredited)
Maria Djurkovic Production Design
Charis Theobald Graphic Designer
Stuart Hilliker Sound Re-Recording Mixer
James G. Nunn Sherborne Student 2
Tatiana Macdonald Set Decoration
Lee Walpole Supervising Sound Editor
Laurence Kennedy Headmaster
Albert Carreras "A" Camera Operator
Steven Hall Second Unit Director of Photography
Nicky Ackland-Snow Construction Coordinator
Simon Surtees Second Assistant "A" Camera
Dan Green Dialogue Editor
Crispin Reece Second Unit Director