The Undeclared War poster
Where to stream

The Undeclared War

6.320222 seasonsTV SeriesWar & PoliticsDramaSci-Fi & Fantasy

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 attempt to ward off a cyber-attack on the country’s electoral system.

Where to watch

Sky GoSky GoChannel 4Channel 4
Availability shown for United Kingdom · rights vary by country

Seasons & Episodes

E1
Episode 1
Jul 21, 2026 1.0
E2
Episode 2
Jul 22, 2026 1.0
E3
Episode 3
Jul 28, 2026 1.0
E4
Episode 4
Jul 29, 2026 1.0
E5
Episode 5
Aug 4, 2026 1.0
E6
Episode 6
Aug 5, 2026 1.0

Cast

HKHannah Khalique-Brown
Hannah Khalique-Brown
Saara Parvan
SPSimon Pegg
Simon Pegg
Danny Patrick
MRMaisie Richardson-Sellers
Maisie Richardson-Sellers
Kathy Freeman
ALAdrian Lester
Adrian Lester
PM Andrew Makinde
SBSian Brooke
Sian Brooke
Barbara Patrick

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The Undeclared War — streaming FAQ

Which OTT platform streams The Undeclared War?

The Undeclared War is streaming on Sky Go and Channel 4 in United Kingdom. It's not currently on Netflix.

Is The Undeclared War on Netflix?

No, The Undeclared War is not on Netflix in United Kingdom as of October 2026. It's currently on Sky Go and Channel 4.

Is The Undeclared War on Amazon Prime Video?

No, The Undeclared War isn't on Amazon Prime Video in United Kingdom right now. It's on Sky Go and Channel 4 instead.

Where can I watch The Undeclared War for free?

The Undeclared War is available to stream free (with ads) on Channel 4 in United Kingdom.

How many seasons are in The Undeclared War?

The Undeclared War has 2 seasons in total (12 episodes). The series concluded in 2026.

Are all episodes of The Undeclared War out yet?

Yes — all 12 episodes across 2 seasons of The Undeclared War are out and available to stream.

Is there a Season 3 of The Undeclared War?

No — The Undeclared War ended after 2 seasons, so there is no Season 3.