When a defecting KGB officer reveals the existence of a devastating Soviet plot, code-named Operation Glass, the charismatic but paranoid head of MI5, known simply as Daddy, assembles a secret committee of spies and intelligence officers to investigate. Are they the best? Or are they the only ones he trusts in a world where double agents, secrets and lies are normality?
They are Bobby Waterhouse, the louche and ambitious head of counter-espionage; Sarah Montag, his dry-witted and fiercely clever deputy; her husband Alan Montag, their cheerful and guileless expert in bugging and interception; Jim Fenchurch, a stoic and sceptical Special Branch police detective and Wendy Straw, the naïve and impressionable secretary.
Finally, there’s operative Joe Lambe; a troubled but genius interrogator, he’s able to read every tic and giveaway of human nature. But Joe has more to him than meets the eye – a dark past and a dangerous secret.
The exact nature of the threat is unclear. All they know is that the Soviets are reactivating sleeper agents across the UK and giving them all a task. Every episode the team receive a new name on the list. Each name is a new traitor to investigate, a mission into the unknown and a step closer to understanding Operation Glass.
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