'A scrupulous piece of reporting, necessary, timely and very sobering' John Le Carré A Sunday Times Best Book of 2018 Agent. Prisoner. Target. Who is Sergei Skripal? 4 March 2018, Salisbury, England. A man and his daughter are found slumped on a bench, poisoned by the deadly nerve agent Novichok. He was a Russian national that became a MI6 spy. Russia are publicly accused of carrying out the attack by the British government, sparking a diplomatic crisis between Russia and the West. Then two innocent people find a discarded perfume bottle used in the attack and one of them, Dawn Sturgess, tragically dies. It is now a murder investigation. How exactly did we get here? Based on interviews with Sergei before his poisoning, Mark Urban explains the most shocking espionage incident in a decade. Describing precisely how an otherwise loyal Russian intelligence officer was turned into an agent by MI6, how Skripal was betrayed so that he found himself in a Siberian prison, and why, years later, was he was targeted for assassination.