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.
Peter Firth
Nicola Walker
Max Brown
Lara Pulver
William Hope
Score: 6.8
Score: 5.9
Score: 7.5
Score: 7.4
Score: 7.1
Score: 6.2
Score: 6.6
Score: 7.0
