The Undeclared War

Name: The Undeclared War
Genre: Drama, Thriller
Released: 2022-01-01
Rating: 6.8
Cast: Hannah Khalique-Brown, Simon Pegg, Maisie Richardson-Sellers, Edward Holcroft, Adrian Lester

2022| 1 season| IMDb 6.8

Watch The Undeclared War (2022) for free in the UK on Channel 4. Last updated 20 January 2026.

Streaming availability last checked 20 January 2026

Drama Thriller

A topical thriller about the ‘undeclared war’ Russia is waging on the West. Set in 2024 in the run-up to a British general election, the series tracks a team of analysts buried in the heart of GCHQ after the country is hit by a vicious cyber-attack.

Creator: Peter Kosminsky