High Quality Content by WIKIPEDIA articles! The seventh series of the BBC espionage television series Spooks (known as MI-5 in the United States) began broadcasting on 27 October 2008 on BBC One before ending on 8 December 2008 on the same channel, and consists of eight episodes, two less than previous series. It follows the actions of Section D, a counter-terrorism division in MI5. The primary storyline involves Sugarhorse, a top secret operation set up by MI5 during the final years of the Cold War, and a mole working for the FSB who intends to leak the operation to the Russians. Peter Firth, Rupert Penry-Jones, Hermione Norris, Richard Armitage, Miranda Raison, Gemma Jones, Hugh Simon and Alex Lanipekun are credited as the main cast.