Matthew Bannister presents the obituary series. Including: Ultrasound pioneer John Wild - Dr John Reid and Professor Kit Hill pay tribute; scriptwriter Troy Kennedy Martin remembered by producers Ted Child and Michael Dealey and by writer Keith Dewhurst; a picture of French photographer Willy Ronis by his agent Kathleen Grosset and friend Paul Ryan; Patti Smith shares her memories of punk poet Jim Carroll; and radio producer Leonie Cohn - a tribute from her son Paul Finlay and colleague Judith Bumpus.