The Undeclared War
Created by Peter Kosminsky
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.
Watch trailerWhere to watch in 🇺🇸 United States
Top cast
Hannah Khalique-Brown
Saara Parvan
Simon Pegg
Danny Patrick
Maisie Richardson-Sellers
Kathy Freeman
Adrian Lester
PM Andrew Makinde
Sian Brooke
Barbara Patrick
Frequently asked questions
Where can I watch The Undeclared War online?
As of November 4, 2026, The Undeclared War is available to stream on Peacock Premium and Peacock Premium Plus in United States. Use the country selector above to check availability in other regions — streaming rights are licensed per country, so catalogues differ.
Is The Undeclared War on Netflix?
No — The Undeclared War is not currently on Netflix in any of the countries we track. In United States it streams on Peacock Premium and Peacock Premium Plus instead.
Can I rent or buy The Undeclared War online?
Yes. In United States, The Undeclared War is available for digital purchase on Amazon Video, Apple TV Store, and Fandango At Home.
In which countries can I stream The Undeclared War?
As of November 4, 2026, The Undeclared War is included with a streaming subscription (or free with ads) in Brazil, Canada, Chile, Colombia, Mexico, Portugal, Spain, United Kingdom, and United States, among the countries we track.
Streaming availability last checked on November 4, 2026. Catalogues change frequently — data from TMDB and JustWatch.
