 | Benedict Cumberbatch als Alan Turing |
 | Keira Knightley als Joan Clarke |
 | Matthew Goode als Hugh Alexander |
 | Rory Kinnear als Detective Robert Nock |
 | Allen Leech als John Cairncross |
 | Matthew Beard als Peter Hilton |
 | Charles Dance als Commander Denniston |
 | Mark Strong als Stewart Menzies |
 | James Northcote als Jack Good |
 | Tom Goodman-Hill als Sergeant Staehl |
 | Steven Waddington als Superintendent Smith |
 | Ilan Goodman als Keith Furman |
 | Jack Tarlton als Charles Richards |
 | Alex Lawther als Young Alan Turing |
 | Jack Bannon als Christopher Morcom |
 | Tuppence Middleton als Helen |
| Dominic Charman als Sherborne Student 1 |
 | James G. Nunn als Sherborne Student 2 |
| Charlie Manton als Sherborne Student 3 |
 | David Charkham als Joan's Father |
 | Victoria Wicks als Joan's Mother |
 | Andrew Havill als Teacher |
| Laurence Kennedy als Headmaster |
 | Tim van Eyken als MI6 Agent |
| Will Bowden als Military Policeman |
| Miranda Bell als Margaret |
 | Tim Steed als Electrical Assistant |
| Bartosz Wandrykow als Crossword Enthusiast |
| Hayley Joanne Bacon als Woman in Crowd (uncredited) |
| Nicholas Blatt als Ministry Man (uncredited) |
 | Ancuta Breaban als Wren (uncredited) |
| Alex Corbet Burcher als Dancer (uncredited) |
| Grace Calder als Assistant Wren (uncredited) |
| Richard Campbell als Crossword Man in Pub (uncredited) |
 | Daniel Chapple als MI6 Agent (uncredited) |
| Lisa Colquhoun als Joan Clarke's Friend (uncredited) |
| Alexander Cooper als Bletchley Park Agent (uncredited) |
| Leigh Dent als Passerby (uncredited) |
| Sam Exley als Military Policeman 3 (uncredited) |
| Denis Koroshko als Civilian (uncredited) |
 | Debra Leigh-Taylor als Evacuee (uncredited) |
 | Stuart Matthews als Bletchley Park Operative (uncredited) |
 | Joseph Oliveira als MI6 Agent (uncredited) |
 | David G. Robinson als Police Sergeant White (uncredited) |
 | Mark Underwood als Crossword Man (uncredited) |
| Nicola-Jayne Wells als First Aid Nurse (uncredited) |
| Josh Wichard als German Pilot (uncredited) |
| Morten Tyldum | Director |
| Graham Moore | Screenplay |
| Peter Wignall | Steadicam Operator |
| Kirsty Whalley | Music Editor |
| William Goldenberg | Editor |
| Nina Gold | Casting |
| Óscar Faura | Director of Photography |
| Maria Djurkovic | Production Design |
| Rebecca Milton | Art Direction |
| Marco Anton Restivo | Art Direction |
| Sammy Sheldon | Costume Design |
| Nora Grossman | Producer |
| Graham Moore | Executive Producer |
| Ido Ostrowsky | Producer |
| Teddy Schwarzman | Producer |
| Peter Heslop | Co-Producer |
| Alexandre Desplat | Original Music Composer |
| Denise Kum | Makeup Artist |
| Roo Maurice | Makeup Artist |
| Amy Riley | Makeup Artist |
| Lauren Briggs-Miller | Assistant Art Director |
| Nicky Ackland-Snow | Construction Coordinator |
| Peter Burgis | Foley |
| Andy Kennedy | Sound Designer |
| Joe Beal | Sound Effects Editor |
| Martin Jensen | Sound Re-Recording Mixer |
| Stuart Hilliker | Sound Re-Recording Mixer |
| Lee Walpole | Supervising Sound Editor |
| Lucy Ainsworth-Taylor | Visual Effects Producer |
| Eran Barnea | Visual Effects Supervisor |
| Angela Barson | Visual Effects Supervisor |
| Jack English | Still Photographer |
| Jonathan Collard | Digital Intermediate |
| Beverly Winston | Script Supervisor |
| Sarah Shepherd | Dialect Coach |
| Richard George | Location Manager |
| Suzie Shearer | Production Manager |
| Nick Dent | Supervising Art Director |
| Robert Messinger | Thanks |
| John Midgley | Sound Recordist |
| Tatiana Macdonald | Set Decoration |
| Nick Thomas | Property Master |
| Dan Green | Dialogue Editor |
| Andrew Hodges | Book |
| Phil Booth | First Assistant Director |
| James Manning | Second Assistant Director |
| Albert Carreras | "A" Camera Operator |
| Tim Battersby | First Assistant "A" Camera |
| Simon Surtees | Second Assistant "A" Camera |
| Marc Gómez del Moral | "B" Camera Operator |
| Rory Moles | First Assistant "B" Camera |
| Alexandra Voikou | Second Assistant "B" Camera |
| Gary Hutchings | Key Grip |
| Crispin Reece | Second Unit Director |
| Steven Hall | Second Unit Director of Photography |
