he tenth and final series of the BBC espionage television series Spooks began broadcasting on 18 September 2011 on BBC One, and continued until 23 October. It consists of six episodes. The series continues the actions of Section D, a fictional counter-terrorism division of the British Security Service. In August 2011, Kudos Film and Television, the production company behind Spooks, announced that the tenth series will be its last, as they wanted the show to end "in its prime."
In this series, former Russian spy-turned-politician Ilya Gavrik, Harry Pearce's opposite during the Cold War, proposes a strategic partnership between Russia and the United Kingdom. Also with Gavrik is his wife Elena, with whom Harry had an affair during the 1980s. However, over the course of the series Section D must stop those who intend to sabotage the partnership. As well as Firth, Nicola Walker, Max Brown, Shazad Latif, Simon Russell Beale, Lara Pulver and Geoffrey Streatfeild are included as the main cast. The final episode includes a cameo appearance of Matthew Macfadyen, who headlined the first two years of the show.Overview from themoviedb.org