|Series 04, Episode 08|
|Air Date||27 October 2005|
The Russian is the eighth episode of spook's fourth series which aired for the first time on 27 October 2005.
After the death of Fiona, Adam is taken off the case to investigate a Russian billionaire Oleg Korsakov, who plans to buy the National Health Service, and then dismantle it. Eventually, Adam convinces Harry to be let back in.
They use Hugo Ross, a double agent for the Russians during the Cold War and Zaf for an operation to work with him. MI5 is able to work around Oleg's counter-surveillance measures and expose his plans. In the end, Adam comes to terms with his wife's death and finally tells her parents and Wes about it.