MI-5: Episode #10.6

The series ten finale of the British spy drama television series Spooks was originally broadcast on BBC One on 23 October 2011. It is the show's sixth episode of the tenth series and the 86th and final episode of Spooks. The episode was written by Jonathan Brackley and Sam Vincent, and directed by Bharat Nalluri. The series finale concludes the "Tourmeline" story-arc that ran through the final series. Section D tries to prevent a terrorist attack from a Russian ultranationalist that will disrupt a partnership between Russia and the United Kingdom, and push both nations into war. The episode sees the return of Tom Quinn, a main character from the first three series portrayed by Matthew Macfadyen. The finale was seen by over five million viewers, a series high, though in the same timeslot it was again beaten by ITV1 period drama Downton Abbey. It was met with generally positive reactions from television critics.