TV & Radio

In a series first shown in Scotland, Neil Oliver traces the lives of four Scottish explorers who planted ideas rather than flags. His first subject is anti-slavery campaigner David Livingstone. Also at 6.00pm today, Time Team returns over on Channel 4 with a visit to Gateholm Island, Pembrokeshire. It was once inhabited, but who lived there?

Jonathan Charles follows the work of forensic archaeologists attempting to locate the remains of Holocaust victims at Treblinka death camp in Poland, where more than 800,000 people were murdered. It’s a delicate and tricky operation: not only did the Nazis destroy evidence of the camp, but Jewish custom forbids disturbing the remains of the dead.

With HS2 looking likely to get the go-ahead, Jonathan Freedland looks to the past to explore what it might tells us about projects to improve the nation’s infrastructure. Also today on Radio 4, Great Lives (4.30pm) finds Shirley Williams speaking up for her mother, the writer Vera Brittain.

Dr Thomas Asbridge focuses on the Third Crusade when the armies of Richard the Lionheart and Saladin squared up to each other. Both men were fine strategists who nonetheless were prepared to commit atrocities as they fought to control Jerusalem. Their campaigning against each other, argues Asbridge, broke both men.

In 1962, rebellious snapper David Bailey and gamine model Jean Shrimpton headed for New York, and a photoshoot for Vogue that would help define the Swinging Sixties. Aneurin Barnard stars as Bailey and Karen Gillan of Doctor Who fame plays Shrimpton in a drama imagining what might have passed between the two.