Kathryn Knight on common denominators and extramusical connections between Part and Bach.
BBC Radio 3
Screenwriter Frank Cottrell Boyce explores the life and work of Antoine de Saint-Exupery. (R)
Rachel Campbell-Johnston visits artist David Hockney in his Yorkshire studio.
Ben Quash considers what we mean when we talk about beauty.
Poet Paul Farley explores how the River Dee has inspired the imagination of writers.