Greg Jenner and his guests discuss the life, times and crimes of Russia's first Tsar, the infamous Ivan the Terrible. Joining Greg are Prof Peter Frankopan from the University of Oxford and Russian-born comedian Olga Koch, whose BBC appearances include OK Computer, Human Error, Fight, QI and The Now Show. For the full-length version of this episode, please look further back in the feed. A production by The Athletic for BBC Radio 4.