Season guide

The Undeclared War: Series 1

6 episodes Premiered Jun 29, 2022 Updated Jul 25, 2026

Season 1 Episodes

Episode Guide

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Season 1: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

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Mytharc (3): Crucial lore & season climaxes

Core (3): Character development & subplots

Side Quest (0): Standalone / filler

S1·E1 Mytharc

Episode 1

Jun 30, 2022 · 47 min

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 un

S1·E2 Core

Episode 2

Jul 7, 2022 · 47 min

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

S1·E3 Core

Episode 3

Jul 14, 2022 · 56 min

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

S1·E4 Core

Episode 4

Jul 21, 2022 · 47 min

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

S1·E5 Mytharc

Episode 5

Jul 28, 2022 · 47 min

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.

S1·E6 Mytharc

Episode 6

Aug 4, 2022 · 47 min

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?