Season 1 Episodes
1. 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 ranks to analyse the malware code without permission and uncovers a greater threat missed by others.
2. Episode 2
Saara befriends John, a veteran GCHQ staffer, and seeks help from Gabriel in decrypting a message in the virus. Danny signs off on Saara attending a cyber conference with US agent Kathy, aware that Russian intelligence will also be there.
3. Episode 3
Vadim returns to Russia where his allegiances are tested, leading him to a risky stunt.
4. Episode 4
With Saara in a difficult position, a revelation forces her hand. Marina moves to London.
5. Episode 5
Signs of irregularity in the UK general election result prompt political unrest, and the nation's relationship with its allies is threatened. Saara makes a devastating discovery.
6. Episode 6
As the true extent of Russia's interference with the UK becomes clear, Saara and her former classmate forces. Can they uncover the hidden code and prevent a war?
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