Summary

Tense drama series about the different challenges faced by the British Security Service as they work against the clock to safeguard the nation. The title is a popular colloquialism for spies, and the series follows the work of a group of MI5 officers based at the service's Thames House headquarters, in a highly secure suite of offices known as The Grid.

Release Date

13 May 2002

Production Companies

BBC, Kudos

Number of Seasons: 10

Total of Episodes: 86