Marian Rejewski
Jerzy Rózycki
Henryk Zygalski
Engineer Antoni Palluth
Col. Gwido Langer
Col. Gustave Bertrand
Mechanic Edward Fokczynski
Heinz Hoger
Commodore Alistair Denniston
Irena Olanska
German spy
Irena Rejewska
Jadwiga Palluth
Barbara Rózycka
Bertrand's wife
Major
Mjr. 'Bartosz'
Brochwitz
Maurice Gustave Gamelin
General Vuillemin
Mjr. Wiegand
Cpt. Delor
Col. Rivet
Col. Artur Szlich
Mjr. Maksymilian Ciezki
Col. Rudolf
Col. Zakrzewski
Adolf Hitler / Actor
Alexander Cadogan
Cpt. Braquenie
Col. Smolenski
Dillwyn Knox
Wilhelm Canaris
Gestapo Officer in Sachsenhausen
Winston Churchill
Stanislaw Danilewicz
Ludomir Danilewicz
Lieutenant
Guard
Cryptologist
German officer
Wasal
King George VI
Aide-de-camp
Romanian officer
Raffalla 'inventor'
Col. Otto Brandt
X (uncredited)