Great Lives Folgen

In 1914, a self-taught Mathematics student named Ramanujan left India for Trinity College Cambridge.Here, alongside the celebrated English mathematician GH Hardy, he completed some extraordinary work on Pi and prime numbers. What was even more extraordinary was that he couldn't prove a lot of his work, and attributed many of his theories to a higher power.For the renowned UK choreographer Akram Khan, there is a beauty in patterns and maths, and he sees Ramanujan's genius as a clash between Eastern and Western cultures. Together with presenter Matthew Parris, he explores the mathematician's life. Guest Professor Robin Wilson, who once visited Ramanujan's home, takes them through some of the maths, and explains why you'll never look at the number 1729 in the same way again.Producer: Toby Field.First broadcast on BBC Radio 4 in January 2017.

Step though the wardrobe - as historian Suzannah Lipscomb selects the creator of the Narnia Chronicles, CS Lewis. The writer was a fascinating and extremely complicated man. Born in Northern Ireland, his mother died when he was a child, and his university career was interrupted so he could fight in the Great War.Suzannah views his writings as deeply moving, as they have influenced her faith.Presenter Matthew Parris is less convinced by the religious influence in his work. But contributor to the Cambridge Companion to CS Lewis, Malcolm Guite sits firmly on Suzannah Lipscomb's side.Produced in Bristol by Miles Warde.First broadcast on BBC Radio 4 in January 2017.

Ruth Holdaway - the former Chief Executive of Women in Sport - picks pioneering sports broadcaster Helen Rollason. Helen trained as a teacher, but after stints in community and local radio, moved to the BBC to report for and later present the BBC’s 'Newsround' for children. She kept her hand in with sport and made history in 1990 when she was appointed as the first female presenter of BBC TV’s flagship 'Grandstand'. Sport was largely a male-dominated world at the time and there were plenty both inside and outside the Corporation who would have happily have seen her fail.Helen died in 1999 aged 43. Presented by Matthew Parris.With John Caunt who helped Helen write her autobiography.Plus contributions from:* Clare Balding * James Pearce * Deb CrookProducer: Toby FieldFirst broadcast on BBC Radio 4 in December 2016.