- 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

S2E5
I Spy Apocalypse
July 07, 2003

S2E4
Blood and Money
June 23, 2003

S2E3
10 Seasons
Current Cast
Ruth Evershed
Nicola Walker
Adam Carter
Rupert Penry-Jones
Lucas North
Richard Armitage