TV series · 2022 · Where to watch
The Undeclared War
Updated November 2, 2026
The battle line is online
The Undeclared War is included with two subscriptions in the US — Peacock and Peacock Premium — plus three rent-or-buy options. Here is the full list and the cheapest way in.
In 2024, as Britain approaches a general election, analysts at the country’s intelligence agency work to defend the electoral system from a major cyber-attack. Their efforts unfold amid political pressure, social unrest, and difficult questions about how far a government should go to protect national security.
- Year
- 2022–2026
- TMDB rating
- 6.3/10 · 103 votes
- Genre
- War & Politics, Drama, Sci-Fi & Fantasy
- Length
- 2 seasons · 12 episodes
- Network
- Channel 4
Streaming now
How to watch The Undeclared War
The Undeclared War is included with two different subscriptions — Peacock and Peacock Premium — so if you already pay for any of them there is nothing extra to buy.
To own it instead, you can buy an episode from $1.99 on Amazon, AppleTV and Fandango at Home.
The Undeclared War ended in 2026 after two seasons and 12 episodes, so what is listed above is the complete run — nothing new is coming.
Created by Peter Kosminsky and starring Hannah Khalique-Brown, Simon Pegg, Maisie Richardson-Sellers and Adrian Lester; it originally aired on Channel 4.
Trailer
Common questions
Is The Undeclared War on Prime Video?
Yes. As of November 2, 2026, The Undeclared War is on Prime Video in the US to buy from $1.99.
Is The Undeclared War on Netflix?
No. As of November 2, 2026, The Undeclared War is not streaming on Netflix in the US. It is on Peacock and Peacock Premium instead.
Can I watch The Undeclared War for free?
Not without a subscription. There is no ad-supported free stream in the US right now; the closest is a free trial on Peacock and Peacock Premium where one is offered.
How many seasons of The Undeclared War are there?
There are two seasons, and the series has ended.
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