S1 E1 • Episode 1

London, 1972. A war has unfolded unlike anything anyone has ever known. A complex and invisible war fought not by armies but individuals. The secret services on both sides of the Iron Curtain would exploit any weakness to further their aims. When a defecting KGB officer reveals details of a devastating Soviet plot, the charismatic head of MI5 must assemble a secret committee to help protect Britain. As the Soviets awaken sleeper agents to carry out the plot, the new team are faced with an unidentified, invisible threat. The first agent has been blackmailed into working for the KGB. As MI5 scramble to identify his role in Operation Glass, Joe Lambe becomes obsessed with the reappearance of his nemesis, the Soviet agent codenamed 'Odin'.

Première diffusion : 5 novembre 2014

S1 E2 • Episode 2

Tom Mallory is a respected employee of the MoD and a sleeper agent secretly working for the KGB. Tom's got high level access to state secrets, and when he discovers the contents of a top-secret letter, he could leave the UK vulnerable to a nuclear attack. Daddy and the team must find him, turn him and stop him before he shatters the precarious peace of the Cold War. Meanwhile, Joe is haunted by events in his past, his lover's killer is in London and he is deeply embroiled in Operation Glass. Can he put his personal vendetta to one side, or will it jeopardise his part in the investigation?

Première diffusion : 12 novembre 2014

S1 E3 • Episode 3

The team discovers a sleeper agent with terrifying connections in the US military. Faced with a formidable foe who not only appears to be a traitor, but a trained spy with access to US bases, MI5 may be out of its league. Meanwhile, Daddy is on a mission of his own to secure the safe defection of his favorite Chinese dancer. But when his assistant, Wendy, goes to carry out the admin, Bobby Waterhouse catches wind and manipulates plans to gain information about Daddy’s secret life for his own personal gain

Première diffusion : 19 novembre 2014

S1 E4 • Episode 4

Discovering the KGB is one step ahead, Joe tries to convince the team to run a double agent scheme – a perilous game that understandably makes his colleagues uneasy. But with dangerous assassin Odin at large, the team is unsure KGB defector, Arkady, would risk his life to help them. Meanwhile, Alan grapples with a shocking discovery that could jeopardize his marriage to fellow agent and wife, Sarah. Bobby’s world begins to unravel when Daddy thwarts his attempts at ascendance and raises questions that threaten to destroy his career.

Première diffusion : 26 novembre 2014

S1 E5 • Episode 5

The team is reeling from the shocking discovery of a mole among them, and as the Soviet plot continues unabated, it is up to Wendy to give the team the break they need. Meanwhile, when Sarah finds herself in danger, Alan is forced to make a decision that can make or break their relationship. Joe has trouble of his own when leaked information threatens the investigation and the lives of the team.

Première diffusion : 3 décembre 2014

S1 E6 • Episode 6

The team is reeling from a KGB bombing and the mole’s confession, but with Operation Glass hurtling towards a shocking climax, MI5 is running out of time to piece the puzzle together and avert disaster. Bobby and Wendy make a crucial discovery which could have implications at the highest levels of government.

Première diffusion : 10 décembre 2014