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