Benedict Cumberbatch Alan Turing
Charles Dance Commander Denniston
Keira Knightley Joan Clarke
Matthew Goode Hugh Alexander
Mark Strong Stewart Menzies
Allen Leech John Cairncross
Tuppence Middleton Helen
Rory Kinnear Detective Robert Nock
Alex Lawther Young Alan Turing
Tom Goodman-Hill Sergeant Staehl
Steven Waddington Superintendent Smith
Alexandre Desplat Original Music Composer
Matthew Beard Peter Hilton
Nina Gold Casting
Jack Bannon Christopher Morcom
Victoria Wicks Joan's Mother
Andrew Havill Teacher
James Northcote Jack Good
Grace Calder Assistant Wren (uncredited)
Andy Kennedy Sound Designer
Joseph Oliveira MI6 Agent (uncredited)
Chris Lyons Special Effects Makeup Artist
Levan Doran Stunts
Morten Tyldum Director
Matt Curtis Title Designer
William Goldenberg Editor
Joshua Wichard German Spy Plane Pilot (uncredited)
John Midgley Sound Recordist
Peter Burgis Foley
Mark Underwood Crossword Man (uncredited)
Marc Gómez del Moral "B" Camera Operator
Teddy Schwarzman Producer
Martin Jensen Sound Re-Recording Mixer
Will Bowden Military Policeman
Sammy Sheldon Costume Design
Laurence Kennedy Headmaster
Maria Djurkovic Production Design
Lee Walpole Supervising Sound Editor
Peter Heslop Co-Producer
Debra Leigh-Taylor Evacuee (uncredited)
Miranda Bell Margaret
Jack English Still Photographer
Tim Steed Electrical Assistant
Alexander Cooper Bletchley Park Agent (uncredited)
Nora Grossman Producer
Katie Anna Brady VFX Artist
Charis Theobald Graphic Designer
Stuart Matthews Bletchley Park Operative (uncredited)
James G. Nunn Sherborne Student 2
Graham Moore Writer, Executive Producer
Charlie Manton Sherborne Student 3
Gary Hutchings Key Grip
Beverly Winston Script Supervisor
Daniel Chapple MI6 Agent (uncredited)
Rory Moles First Assistant "B" Camera
Óscar Faura Director of Photography
Tatiana Macdonald Set Decoration
Ilan Goodman Keith Furman
Rebecca Milton Art Direction
Albert Carreras "A" Camera Operator
James Manning Second Assistant Director
Jack Tarlton Charles Richards
Denise Kum Makeup Artist
Leigh Dent Passerby (uncredited)
Dennis Good Civilian (uncredited)
Lucy Ainsworth-Taylor Visual Effects Producer
Steven Hall Second Unit Director of Photography
Peter Wignall Steadicam Operator
Tim Battersby First Assistant "A" Camera
Lauren Briggs-Miller Assistant Art Director
Eran Barnea Visual Effects Supervisor
Nicholas Blatt Ministry Man (uncredited)