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.
as Harry Pearce
as Ruth Evershed
as Dimitri Levendis
as Erin Watts
as Jim Coaver
as Ben Kaplan
as Calum Reed
as Sasha Gavrik
as Elena Gavrik
as Ilya Gavrik
as William Towers
