Spooks

S09E03 Paroxocybin

Section D reluctantly brings an FSB officer onto the Grid to assist in the hunt for Aibek, a rogue nationalist from the former Soviet republic of Azakstan. Aibek is in the UK searching for the final known sample of the nerve agent 'Paroxocybin'. The team races against time to prevent the dangerous substance from ending up in the wrong hands, all while trying to maintain delicate Anglo-Russian relations. Meanwhile, Lucas experiences a fiery development in his personal life, adding another layer of complexity to the situation.