Otto contracts a strange illness and Charlotte rushes to Rome to be by his side. Philippe talks to an old friend who was working for British intelligence in 1949 and explores who might have been hunting Otto in Rome and why. Producer: Gemma Newby Sound design: Neil Churchill Research: James Everest and Lea Main-Klingst Original music by Catrin Finch and Sekou Keita Otto Wachter: Stephen Fry Charlotte Wachter: Laura Linney Other parts by members of the BBC Radio Drama Company