Covers the themes of direction and different applications in the real world. Presented by Gareth Jones & Sheryl Simms.
Neil MacGregor looks at National Gallery paintings from the 18th and 19th centuries, including works by Turner, Monet and Joseph Wright.
Regional Variations (2)
David Attenborough looks at how plants often rely on animals, fungi and each other for food, protection or a home, but they do not always co-exist peacefully.
Jeremy Isaacs interviews American playwright Arthur Miller as his latest play, "Broken Glass", transfers to London's West End and "A View from the Bridge" begins a national tour.