Episode 1
Episode 1
48m1.0 / 10
As Danny deals with the fallout from the Russian cyber-attack, a bold new threat emerges.
Where to watch The Undeclared War
TV series
The Undeclared War
20222 seasons6.3 / 10
The battle line is online
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.
Streaming, rental and purchase options
Where to watch in United States
Checked Sep 2, 2026
The Undeclared War is available to stream on Peacock and Peacock Premium in United States. Use the direct links below to open the provider.
Synopsis
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.
Season 2 episodes
Choose an episode, then use the watch options above for the show.
Episode 2
Episode 2
47m1.0 / 10
Vadim finds himself working for the Chinese. Danny and Roz clash, and the mole hunt is on.
Where to watch The Undeclared War
Episode 3
Episode 3
48m1.0 / 10
Barbara faces an impossible decision when her charming ex-boyfriend Nicky Chan re-appears.
Where to watch The Undeclared War
Episode 4
Episode 4
48m1.0 / 10
A malware attack on British government departments forces Danny and Roz to work together.
Where to watch The Undeclared War
Episode 5
Episode 5
43m1.0 / 10
Charlie interrogates Barbara, and Danny discovers a clue that turns his life upside down.
Where to watch The Undeclared War
Episode 6
Episode 6
47m1.0 / 10finale
Danny puts everything on the line in order to right some wrongs.
Where to watch The Undeclared WarEpisode information updated Sep 17, 2026
More about The Undeclared War
Cast
Hannah Khalique-BrownSaara Parvan
Simon PeggDanny Patrick
Maisie Richardson-SellersKathy Freeman
Edward HolcroftJames Cox
Adrian LesterPM Andrew Makinde
Alex JenningsDavid Neal
Hattie MorahanElizabeth Kahn
Ed StoppardRichard MarstonCredits
- Created by
- Peter Kosminsky
- Written by
- Peter Kosminsky, Declan Lawn, Amelia Spencer, Adam Patterson
Production details
- Status
- Ended
- Series type
- Scripted
- Episodes
- 12
- Original language
- English
Networks & production
Channel 4United Kingdom
Playground EntertainmentUnited States
Universal International StudiosUnited Kingdom- Stonehenge FilmsUnited Kingdom
Themes
absurdbritish spyclichécomputer hackercovert operationembarrassedespionagepolitics
