The story of the WWII project to crack the code behind the Enigma machine, used by the Germans to encrypt messages sent to their submarines.
Tom Jericho
Hester Wallace
Claire Romilly
Mr. Wigram
Puck
Logie
Leveret
Cave
Baxter
Pinker
Kingcome
Upjohn
Skynner
Admiral Trowbridge
Villiers
Commander Hammerbeck
Mr. Mermagen
Heaviside
Kay
U-boat Commander
Mrs. Armstrong
Duty Clerk
De Brooke
Pamela
Land Army Girl
Male Lodger
Lady Lodger
