The latest national and international news, exploring the day's events from a global perspective.

Michael Portillo tours Chester's Roman remains, discovers a secret World War II chemical weapons plant at Rhydmwyn and goes mussel fishing on the Conwy estuary. Show more

Professor Richard Fortey looks at how some species survived the ice age which began 2.8 million years ago, triggered by changes in the Earth's orbit around the sun. Show more

Series on the revolution in 20th century music looks at the fragmented, abstract and discordant sound taken up by radical composers such as Schoenberg and Webern. Show more

Documentary about the Antikythera Mechanism, a 2,000-year-old object now regarded as the world's oldest computer, found by divers excavating an ancient Roman shipwreck in 1901. Show more

Comedy series about a man seeking political office. Looking for a campaign boost, Bob courts both the religious vote and the women of Broughty Ferry in a twin attack. Show more

Exploring what makes a great pop album, Danny Baker celebrates the golden age of the analogue, vinyl LP with guests Boy George, Grace Dent and David Hepworth. Show more

Documentary showing how the long-playing album changed popular music for ever between the mid-1960s and the late 1970s by allowing artists to express themselves as never before. Show more

Documentary about the early female movie stars: Greta Garbo, Marlene Dietrich, Rita Hayworth, Marilyn Monroe - immortal goddesses made by Hollywood to reign over the silver screen. Show more

Series on the revolution in 20th century music looks at the fragmented, abstract and discordant sound taken up by radical composers such as Schoenberg and Webern. Show more