Benedict Cumberbatch
Alan Turing
Keira Knightley
Joan Clarke
Matthew Goode
Hugh Alexander
Rory Kinnear
Detective Robert Nock
Allen Leech
John Cairncross
Matthew Beard
Peter Hilton
Charles Dance
Commander Denniston
Mark Strong
Stewart Menzies
James Northcote
Jack Good
Tom Goodman-Hill
Sergeant Staehl
Steven Waddington
Superintendent Smith
Ilan Goodman
Keith Furman
Alex Lawther
Young Alan Turing
Jack Bannon
Christopher Morcom
Tuppence Middleton
Helen
James G. Nunn
Sherborne Student 2
David Charkham
Joan's Father
Victoria Wicks
Joan's Mother
Andrew Havill
Teacher
Tim van Eyken
MI6 Agent
Tim Steed
Electrical Assistant
Ancuta Breaban
Wren (uncredited)
Grace Calder
Assistant Wren (uncredited)
Daniel Chapple
MI6 Agent (uncredited)
Debra Leigh-Taylor
Evacuee (uncredited)
Stuart Matthews
Bletchley Park Operative (uncredited)
Joseph Oliveira
MI6 Agent (uncredited)
David G. Robinson
Police Sergeant White (uncredited)
Mark Underwood
Crossword Man (uncredited)
Jack Tarlton
Charles Richards
Dominic Charman
Sherborne Student 1
Charlie Manton
Sherborne Student 3
Laurence Kennedy
Headmaster
Will Bowden
Military Policeman
Miranda Bell
Margaret
Bartosz Wandrykow
Crossword Enthusiast
Hayley Joanne Bacon
Woman in Crowd (uncredited)
Nicholas Blatt
Ministry Man (uncredited)
Alex Corbet Burcher
Dancer (uncredited)
Richard Campbell
Crossword Man in Pub (uncredited)
Lisa Colquhoun
Joan Clarke's Friend (uncredited)
Alexander Cooper
Bletchley Park Agent (uncredited)
Leigh Dent
Passerby (uncredited)
Sam Exley
Military Policeman 3 (uncredited)
Denis Koroshko
Civilian (uncredited)
Nicola-Jayne Wells
First Aid Nurse (uncredited)
Josh Wichard
German Pilot (uncredited)
