Kirsty Young's castaway is microbiologist Professor Peter Piot. (R)
10/10 Sir David Cannadine examines Churchill's lifelong fascination with gadgets and technology.
Matthew Bannister on a businessman, a singer, a novelist, a social worker and a pop star.
Moira was blinded by illness and nearly died, but her daughter gave her a reason to go on.
8/8 Mervyn King champions the life of former prime minister of Finland Risto Ryti. (R)
A daughter praises her mother's ability to pass on artistic inspiration without preaching.