Vanessa Kirby gets Christo Grozev, a modern Sherlock Holmes, to share the secrets of how he solved one of the most notorious assassination attempts of the 21st century - the poisoning of retired Russian double-agent Sergei Skripal, hospitalised by a mysterious nerve agent on British soil. Would YOU have the skills to do the same? From SPYSCAPE, the global HQ of secrets and skills. A Cup And Nuzzle production. Series producer: Gemma Newby. Produced by Tim Mansel. Music by Nick Ryan. Learn more about your ad choices. Visit megaphone.fm/adchoices