The incredible true story of the assassination attempt on double agent and spy Sergei Skripal and his daughter Yulia, which sent shockwaves through a small community and the public services left to deal with an unprecedented national emergency.
S1 E1: Episode 1
Emergency services descend on Salisbury's bustling city centre, where they find Sergei and Yulia Skripal unconscious - the source of their illness is unknown. Nick Bailey investigates.
Anne-Marie Duff, Rafe Spall, Myanna Buring, Mark Addy