Seasons & Episodes
Episode 1
A young intern's first day at GCHQ coincides with a major cyberattack on the UK. To win her superiors' trust, she breaks
Episode 2
Saara befriends John, a veteran GCHQ staffer, and seeks help from Gabriel in decrypting a message in the virus. Danny si
Episode 3
Vadim returns to Russia where his allegiances are tested, leading him to a risky stunt.
Episode 4
With Saara in a difficult position, a revelation forces her hand. Marina moves to London.
Episode 5
Signs of irregularity in the UK general election result prompt political unrest, and the nation's relationship with its
Episode 6
As the true extent of Russia's interference with the UK becomes clear, Saara and her former classmate join forces. Can t
Episode 1
As Danny deals with the fallout from the Russian cyber-attack, a bold new threat emerges.
Episode 2
Vadim finds himself working for the Chinese. Danny and Roz clash, and the mole hunt is on.
Episode 3
Barbara faces an impossible decision when her charming ex-boyfriend Nicky Chan re-appears.
Episode 4
A malware attack on British government departments forces Danny and Roz to work together.
Episode 5
Charlie interrogates Barbara, and Danny discovers a clue that turns his life upside down.
Episode 6
Danny puts everything on the line in order to right some wrongs.
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