4/5. In Scotland,
Dan Cruickshank visits arguably the greatest symbol of the Victorian railway age. (AD) A new episode on Wednesday at 10pm
A double bill of episodes five and six to conclude the wartime drama. U-96 attempts to pass the heavily defended Straits of Gibraltar. In German with English subtitles. Repeated next Sunday on BBC2.
Olga Chekhova was a niece of playwright Anton Chekhov and a famous film star in Nazi Germany. But she was also a spy for Soviet intelligence from the 1920s to the 1940s, recruited by her brother Lev, a Russian composer. Historian Antony Beevor gives an absorbing account of their story.
From hidden and hunted tribes in the jungles of Laos to the heart of Africa, where Ugandan forces fight armies of kidnapped women and children, a quartet of film-makers tell the extraordinary stories behind the making of BBC2's global war diary One Day of War: This World.
