Philippe Sands accesses the Vatican archives to find out about Otto's protector in Rome, the man who was by his side as he lay dying, Alois Hudal. Hudal's archivist reveals to the team something extraordinary. 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