In this special episode, The Crisis Room takes you back to March 2018 and Russia's extraordinary attempt to assassinate a former spy on British soil. Not only did the Novichok attack in Salisbury kill Dawn Sturgess, but the incident left dozens of other innocent civilians injured and prompted an international backlash against Putin and his regime.

Amber was Home Secretary at the time and led the UK's response to this crisis - and in this week's episode she reveals what it was like to chair COBRA meetings, visit Salisbury and victims of the attack in the days afterwards, and to deal with government colleagues - such as Boris Johnson - who were trying to use the story for personal political gain.

Mark remains the only journalist to have ever interviewed Sergei Skripal - the Russian agent who was the intended victim of the attack - and he explains why the former spy was targeted, and what this brazen assassination attempt told the West about Putin. Meanwhile Marc P looks at the role Donald Trump and other world leaders played in responding to this crisis - and whether Russia ultimately emerged from this episode as the winner.

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