Alan Turing

Benedict Cumberbatch

Acting

Joan Clarke

Keira Knightley

Acting

Hugh Alexander

Matthew Goode

Acting

Detective Robert Nock

Rory Kinnear

Acting

John Cairncross

Allen Leech

Acting

Peter Hilton

Matthew Beard

Acting

Commander Denniston

Charles Dance

Acting

Stewart Menzies

Mark Strong

Acting

Jack Good

James Northcote

Acting

Sergeant Staehl

Tom Goodman-Hill

Acting

Superintendent Smith

Steven Waddington

Acting

Keith Furman

Ilan Goodman

Acting

Charles Richards

Jack Tarlton

Acting

Young Alan Turing

Alex Lawther

Acting

Christopher Morcom

Jack Bannon

Acting

Helen

Tuppence Middleton

Acting

Sherborne Student 1

Dominic Charman

Acting

Sherborne Student 2

James G. Nunn

Acting

Sherborne Student 3

Charlie Manton

Directing

Joan's Father

David Charkham

Acting

Joan's Mother

Victoria Wicks

Acting

Teacher

Andrew Havill

Acting

Headmaster

Laurence Kennedy

Acting

MI6 Agent

Tim van Eyken

Acting

Military Policeman

Will Bowden

Acting

Margaret

Miranda Bell

Acting

Electrical Assistant

Tim Steed

Acting

Woman in Crowd (uncredited)

Hayley Joanne Bacon

Acting

Ministry Man (uncredited)

Nicholas Blatt

Acting

Wren (uncredited)

Ancuta Breaban

Acting

Dancer (uncredited)

Alex Corbet Burcher

Acting

Assistant Wren (uncredited)

Grace Calder

Acting

Crossword Man in Pub (uncredited)

Richard Campbell

Acting

MI6 Agent (uncredited)

Daniel Chapple

Acting

Joan Clarke's Friend (uncredited)

Lisa Colquhoun

Acting

Bletchley Park Agent (uncredited)

Alexander Cooper

Acting

Passerby (uncredited)

Leigh Dent

Acting

Military Policeman 3 (uncredited)

Sam Exley

Acting

Civilian (uncredited)

Dennis Good

Acting

Evacuee (uncredited)

Debra Leigh-Taylor

Acting

Bletchley Park Operative (uncredited)

Stuart Matthews

Acting

MI6 Agent (uncredited)

Joseph Oliveira

Acting

Police Sergeant White (uncredited)

David G. Robinson

Acting

Crossword Man (uncredited)

Mark Underwood

Acting

First Aid Nurse (uncredited)

Nicola-Jayne Wells

Costume & Make-Up

German Pilot (uncredited)

Josh Wichard

Acting

German Spy Plane Pilot (uncredited)

Joshua Wichard

Acting