BBC Four HD Monday

Biologist Ben Garrod explores the complex ways, from camouflage to deadly toxins, in which the skin helps animals defend themselves against threats of all kinds

The historian tells the stories of six people who lived through the Blitz, featuring archive footage and readings from oral history collections and private, unpublished diaries

German historian Heike Görtemaker introduces a never-before-broadcast interview conducted in 1971 with Albert Speer, Hitler's architect and armaments minister

An interview from 1971 never before broadcast in its entirety, with Hitler's architect and armaments minister cross-examined by Michael Charlton, Hugh Trevor-Roper and George Ball

A 1996 profile of Hitler's architect, armaments minister and friend Albert Speer, questioning whether his admission of guilt at the Nuremberg trials was born of genuine remorse

Drama-documentary telling the story of the Roman Empire. As the Roman Empire expanded, so did the diversity of exotic beasts brought back to entertain the Colosseum crowds

Drama-documentary telling the story of the Roman Empire. Emperor Trajan throws his great games of AD 107, and the crowd is treated to a rare spectacle - female gladiators

Ignatius refuses to pledge his allegiance to the emperor and is forced to travel from Antioch to Rome, where awaits his final punishment at The Colosseum. Anthony Barclay stars

Biologist Ben Garrod explores the complex ways, from camouflage to deadly toxins, in which the skin helps animals defend themselves against threats of all kinds

The historian tells the stories of six people who lived through the Blitz, featuring archive footage and readings from oral history collections and private, unpublished diaries