Two Russian men visit Salisbury just as the former spy Sergei Skripal and his daughter are poisoned with a nerve agent. They say they simply wanted to see the famous cathedral spire, but that’s not the view of the UK authorities who believe they came to kill. In this episode we learn more about the men, their movements and their real identities. Plus, we learn more about the Russian intelligence agencies from writer and historian Mark Galeotti.

This episode was made by Marie Lennon, Andy Howard, Tom Ryan & Dan O’Brien.

Executive production by Mary Sanders and Naomi Wordley.

Audio credit: JJ Extra, Salisbury Museum, ViaTravelers and British Pathe.