In the final episode, Simon Sebag Montefiore follows the Habsburgs to their dramatic demise. From his struggles with Napoleon III and Bismarck and the suicide of his son Rudolf, to the assassination of his beautiful wife Sisi, Emperor Franz Josef's empire and his family proved impossible to control.

But while the Habsburgs headed for extinction, Vienna blossomed. As the theories of Freud and the sensuality of the secession artists like Klimt and Schiele ushered in the modern age, Hitler and Stalin stalked her streets. It was here that World War I was sparked; it was here World War II was dreamed.