With Anne McElvoy. Curator Frances Spalding and Dr Alexandra Harris discuss what portaits of Virginia Woolf convey of her character as a new exhibition opens at the National Portrait Gallery. Richard Flanagan's father was a Japanese POW on the "Death Railway". The Australian novelist's new book The Narrow Road to the Deep North was inspired by this.New Generation Thinker Alun Withey looks back at medical history. Stella Rimmington, former director general of MI5 and diplomat Alan Judd discuss turning their experiences of the security services into fiction.