As the team fear reprisals against Iran following the revelation of their bio-weapons programme, a British plane is apparently hijacked and flown into a US air base. But after they visit the base and Ros iscaptured by the shadowy Yalta organisation, they discover the sordid extent of an international cover-up.

Attempting to stop an Iranian nuclear deal in the UK, Adam is framed for the killing of a mugger, who turns out to be a journalist.