Three Polish mathematicians are the first to crack the sophisticated Enigma code used by the Germans just before the Second World War. They build replicas of the Enigma machines and manage to get two of the machines to the British and French code-breakers before the German invasion of Poland in 1939; they ask that recognition be given to their work at the end of the war. After the invasion, the Polish cipher bureau escapes and continues their decoding in Algeria and unoccupied France.
as Marian Rejewski
as Jerzy Rózycki
as Henryk Zygalski
as inżynier Antoni Palluth
as Col. Gwido Langer
as Col. Gustave Bertrand
as Mechanic Edward Fokczynski
as Heinz Hoger
as Commodore Alistair Denniston
as Irena Olanska
as German spy
as Jadwiga Palluth
as Barbara Różycka
as Bertrand's wife
as Irena Rejewska
