Three-part documentary telling the story of the 2018 poisoning of ex-Russian spy Sergei Skripal and his daughter Yulia in the quiet city of Salisbury, an incident that sent shockwaves across the globe. Just months later, British mother of three Dawn Sturgess died accidentally after coming into contact with Novichok, the nerve agent used in the original attack. Episode one explores the poisoning of Skripal - a reckless assassination attempt that put thousands of innocent lives in danger; and the efforts of those on the frontline to solve the investigation before anyone else fell ill