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