Season 1

E1. Episode 1

Jun 30, 2022 · 47m

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.

E2. Episode 2

Jul 7, 2022 · 47m

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.

E3. Episode 3

Jul 14, 2022 · 56m

Vadim returns to Russia where his allegiances are tested, leading him to a risky stunt.

E4. Episode 4

Jul 21, 2022 · 47m

With Saara in a difficult position, a revelation forces her hand. Marina moves to London.

E5. Episode 5

Jul 28, 2022 · 47m

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.

E6. Episode 6

Aug 4, 2022 · 47m

As the true extent of Russia's interference with the UK becomes clear, Saara and her former classmate join forces. Can they uncover the hidden code and prevent a war?