The Undeclared War
“The battle line is online”
Where to watch The Undeclared War in Taiwan
The Undeclared War is streaming on HBO Max in Taiwan. Availability checked 12 September 2026.
About The Undeclared War
The Undeclared War is a 2022 web series in the War & Politics, Drama and Sci-Fi & Fantasy genres, created by Peter Kosminsky, starring Hannah Khalique-Brown, Simon Pegg and Maisie Richardson-Sellers. It spans 2 seasons and 12 episodes, and originally aired on Channel 4. It holds an average rating of 6.3/10 from 102 viewers. Below you can see where to watch The Undeclared War in Taiwan — across streaming, rental and purchase options — along with the full cast, trailer and viewer reviews.
The Undeclared War trailer
Overview
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.
Seasons (2)
- Series 16 episodes · 2022
- Series 26 episodes · 2026
Top cast
Themes & keywords
Frequently asked questions
Where can I watch The Undeclared War in Taiwan?+
In Taiwan, you can stream The Undeclared War on HBO Max.
Is The Undeclared War on Netflix?+
The Undeclared War is not on Netflix in Taiwan right now, but you can stream it on HBO Max.
How many seasons of The Undeclared War are there?+
The Undeclared War has 2 seasons and 12 episodes in total.
Who stars in The Undeclared War?+
The Undeclared War stars Hannah Khalique-Brown, Simon Pegg, Maisie Richardson-Sellers, Adrian Lester and Sian Brooke.
When did The Undeclared War come out?+
The Undeclared War is a 2022 web series created by Peter Kosminsky.
What genre is The Undeclared War?+
The Undeclared War is War & Politics, Drama and Sci-Fi & Fantasy series.
Who created The Undeclared War?+
The Undeclared War was created by Peter Kosminsky.
User reviews
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