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The Best Episodes of The Undeclared War

Every episode of The Undeclared War ranked from best to worst. Let's dive into the Best Episodes of The Undeclared War!

Binge this in 9h 32m•Peaking at 7.9/10

In the post-pandemic world of 2024 during an upcoming British general election involving the UK’s first Black Conservative prime minister, a leading team of analysts at the heart of the UK’s NSA-style spy agency GCHQ

Airs on
Channel 4
BestEpisodes
WorstEpisodes
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Seasons2

All12

Episode Rankings

  1. #1 Fan Favorite
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    The Undeclared War Season 2 Episode 6 - Episode 6
    7.9/10(123 votes)

    S2:E6

    Danny puts everything on the line in order to right some wrongs.

    Director:Unknown
    Writer:Unknown

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  2. The Undeclared War Season 2 Episode 5 - Episode 5
    7.5/10(114 votes)

    S2:E5

    Charlie interrogates Barbara, and Danny discovers a clue that turns his life upside down.

    Director:Unknown
    Writer:Unknown

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  3. The Undeclared War Season 2 Episode 4 - Episode 4
    7.4/10(126 votes)

    S2:E4

    A malware attack on British government departments forces Danny and Roz to work together.

    Director:Unknown
    Writer:Unknown

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  4. The Undeclared War Season 1 Episode 6 - Episode 6
    7.3/10(373 votes)

    S1:E6

    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?

    Director:Unknown
    Writer:Unknown

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  5. The Undeclared War Season 1 Episode 3 - Episode 3
    7.2/10(364 votes)

    S1:E3

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

    Director:Unknown
    Writer:Unknown

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  6. The Undeclared War Season 1 Episode 1 - Episode 1
    7.1/10(495 votes)

    S1:E1

    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.

    Director:Peter Kosminsky
    Writers:Amelia Spencer, Peter Kosminsky, Adam Patterson, Declan Lawn

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    The 20 WORST Episodes of The Undeclared War

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  7. The Undeclared War Season 1 Episode 2 - Episode 2
    7.1/10(387 votes)

    S1:E2

    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.

    Director:Unknown
    Writer:Unknown

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  8. The Undeclared War Season 1 Episode 4 - Episode 4
    7.1/10(320 votes)

    S1:E4

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

    Director:Unknown
    Writer:Unknown

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  9. The Undeclared War Season 1 Episode 5 - Episode 5
    7.1/10(315 votes)

    S1:E5

    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.

    Director:Unknown
    Writer:Unknown

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  10. The Undeclared War Season 2 Episode 1 - Episode 1
    7.1/10(159 votes)

    S2:E1

    As Danny deals with the fallout from the Russian cyber-attack, a bold new threat emerges.

    Director:Unknown
    Writer:Unknown

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  11. The Undeclared War Season 2 Episode 2 - Episode 2
    7.0/10(130 votes)

    S2:E2

    Vadim finds himself working for the Chinese. Danny and Roz clash, and the mole hunt is on.

    Director:Unknown
    Writer:Unknown

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  12. The Undeclared War Season 2 Episode 3 - Episode 3
    7.0/10(133 votes)

    S2:E3

    Barbara faces an impossible decision when her charming ex-boyfriend Nicky Chan re-appears.

    Director:Unknown
    Writer:Unknown

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Best Episodes Summary

"Episode 6" is the best rated episode of "The Undeclared War". It scored 7.9/10 based on 123 votes. Directed by Unknown and written by Unknown, it aired on 8/5/2026. This episode scored 0.4 points higher than the second highest rated, "Episode 5".