Yesterday: The World at War
The Allied offensive in the Pacific, where America's two-pronged attack led to heavy casualties on both sides, as the Japanese mounted a ferocious defence. Narrated by Laurence Olivier.
Keeley Hawes narrates the story of how a 24-year-old maths student and a GPO engineer unravelled the secrets of Adolf Hitler's personal code machine - reputedly even more secure than the Enigma device. The duo's work played an important role in ending the conflict in Europe, but because of its classified nature and continued application during the Cold War, the two men were never officially recognised.