The BEST episodes of The Undeclared War

Every episode of The Undeclared War ever, ranked from best to worst by thousands of votes from fans of the show. The best episodes of The Undeclared War!

A leading team of analysts in GCHQ secretly work to ward off a series of cyber-attacks on the UK in the run-up to a general election in post-pandemic 2024.

Last Updated: 1/11/2025Network: Channel 4Status: Ended

7.92

264 votes

#1 - Episode 6

Season 1 - Episode 6 - Aired 8/4/2022

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?

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7.54

259 votes

#2 - Episode 5

Season 1 - Episode 5 - Aired 7/28/2022

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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7.45

256 votes

#3 - Episode 4

Season 1 - Episode 4 - Aired 7/21/2022

With Danny unconvinced by Saara's exchange with a whistleblower, she's in a difficult position, but a revelation from Kathy forces Saara's hand. Meanwhile, Marina takes up a new opportunity in London.

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7.40

346 votes

#4 - Episode 1

Season 1 - Episode 1 - Aired 6/30/2022

Student Saara wins a coveted internship at GCHQ, but when a significant part of the UK's internet goes down, she quickly finds herself operating on the frontier of high-stakes cyber warfare.

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7.37

269 votes

#5 - Episode 3

Season 1 - Episode 3 - Aired 7/14/2022

Saara's classmate Vadim returns to St Petersburg. He reluctantly takes a covert job and soon becomes the victim of his own success as his allegiances are put to the test, leading him to a risky stunt.

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7.28

304 votes

#6 - Episode 2

Season 1 - Episode 2 - Aired 7/7/2022

Saara finds a suspicious line of encrypted text within the virus's code and unravels a dubious invitation. Is she getting closer to the truth or falling into a trap?

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