Two spies turn double agents at the height of the Cold War standoff between East and West. Their deception happens as the superpowers edge towards nuclear war.

Spies work behind the scenes as the superpowers enter a new era. Intelligence pushes world leaders towards a more peaceful approach. But a new danger is lurking in the shadows.

This episode doesn’t exist! A request for removal has been reported. Although it will probably still be here in three months time. So, I have removed the date from First Air Date, to stop it showing up in people’s lists of unwatched programmes.