Karina Urbach is a Longterm Visitor at the Institute for Advanced Study, Princeton. She has published several books on nineteenth and twentieth-century history, including Bismarck's Favourite Englishman: Lord Odo Russell's Mission to Berlin (I.B.Tauris, 2000) and Secret Intelligence in the European States System, 1918-1989 (Stanford University Press, 2013), co-edited with Jonathan Haslam. She has also contributed to several British and German TV documentaries, and was the historical advisor for BBC Two's Royal Cousins at War (2014).