- Network: BBC One
- Aired: May 13, 2002
- Country: GB
- Runtime: 60 minutes
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Overview
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.
Episodes

S9E8
Cat and Mouse
November 08, 2010

S9E7
Dead Drop
November 01, 2010

S9E6
Cybershell
October 25, 2010
10 Seasons
Current Cast
Ruth Evershed
Nicola Walker
Adam Carter
Rupert Penry-Jones
Lucas North
Richard Armitage