The Heir

S1 E2: Tsar Ivan at the zenith of his glory. He gathered around him faithful people and wise advisers - Sylvester, Alexei Adashev, Metropolitan Macarius and Prince Andrei Kurbsky. He triumphantly took impregnable Kazan and annexed it to the Russian kingdom. He created a new army and established a new law. But most importantly, his wife Anastasia finally gave birth to his heir Demetrius.