Series 8, Episode 4 (Spooks)
The episode also continues the story-arc of "Nightingale", a shadow organisation bent on a New World Order, and reveals that CIA liaison Sarah Caufield is a part of it.
Lucas reminisces that during his imprisonment in Russia, he developed a bond with Darshavin and mentioned wanting to go birdwatching in the Thames Estuary.
Ruth Evershed (Nicola Walker) and Tariq Masood (Shazad Latif) looks into this and finds a link between al Khaled and Onelight, a charity front he used to recruit members.
One of Malcolm Wynn-Jones' former assets, who is in hiding out of fear from the terrorist, left Ruth subtle clues leading to the time and location of the attack.
Before he is delivered however, Darshavin attempts to bargain his way out by revealing details of a secret meeting in Basel, Switzerland from "Nightingale", something Harry is already aware of in a previous episode.
[2] In a secondary story, Harry asks London's CIA director Samuel Walker (Brian Protheroe) for help on looking into the meeting.
[5] I did [...] very much enjoy the classic spying methods in evidence in Waterstones; the economy with which the tension between Harry and Ruth is being played out; the moment when Sarah let herself into Lucas's flat – and threw her boss over the stairwell when he came close to uncovering her.The episode originally aired on BBC Three on 20 November 2009, and later repeated on frontline channel BBC One on 25 November, both cases airing during the 9pm to 10pm timeslot.
"[6] Robert McLaughlin of Den of Geek noted that Lucas "spends a lot of this episode in a state of undress", and that while it was "a more personal episode, there are some huge implications set up and executed for the rest of the series, and while it might seem a waste of momentum to re-tread the imprisonment of Lucas from the beginning of last season, all the flashbacks, dabs of information and the entire setup are all relevant", concluding by stating that "Spooks continues to be one of the best shows the Beeb currently offers.
