The Undeclared War

The elite Malware Department at GCHQ grapples with the aftermath of a devastating Russian cyber-attack. Just when it seems the UK has gained the upper hand, Danny and his team discover a mole in their midst and uncover a far more dangerous threat.

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  E1Episode 1

  Jul 21, 2026
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  E2Episode 2
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  E3Episode 3
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  E4Episode 4
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  E5Episode 5
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  E6Episode 6

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  E1Episode 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.

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  E2Episode 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.

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  E3Episode 3

  Jul 14, 2022· 56m

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

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  E4Episode 4

  Jul 21, 2022· 47m

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

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  E5Episode 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.

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  E6Episode 6Finale

  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?