Episode #1.2

S1, E2: Salisbury is transformed into a military zone as troops cordon off the city. Tracy grapples with the immense pressure of public safety, while investigation reveals that Sergei, at odds with Russia, was targeted with the lethal nerve agent Novichok. The source is traced to his home, where DS Nick was also exposed, devastating his family. Shrouded in fear and anxiety, the city remains plunged in a chaotic crisis with no clear end in sight.