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Derek Jacobi as Alan Turing |
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Alun Armstrong as Mick Ross |
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Blake Ritson as Christopher Morcom |
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Prunella Scales as Sara Turing |
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Harold Pinter as John Smith |
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Julian Kerridge as Ron Miller |
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Richard Johnson as Dilwyn 'Dilly' Knox |
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Amanda Root as Patricia 'Pat' Green |
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William Mannering as Young Alan Turing |
| Directing | Herbert Wise | Director |
| Writing | Andrew Hodges | Book |
| Writing | Hugh Whitemore | Writer |
| Art | Fiona McNeill | Art Direction |
| Production | Rebecca Eaton | Executive Producer |
| Production | John Drury | Executive Producer |
| Costume & Make-Up | Kate Benton | Makeup Artist |
| Costume & Make-Up | Frances Tempest | Costume Design |
| Editing | Laurence Méry-Clark | Editor |
| Costume & Make-Up | Pam Meager | Makeup Designer |
| Production | Richard Langridge | Executive Producer |
| Production | Andrew Rowley | Producer |
| Camera | Robin Vidgeon | Director of Photography |
| Production | Pippa Ailion | Casting |
| Production | Jack Emery | Producer |
| Art | Barbara Gosnold | Production Design |
| Costume & Make-Up | Kate Hodgson | Makeup Artist |
| Sound | Philip Alton | Sound Editor |
| Sound | Maurice Hillier | Sound Recordist |
