The Undeclared WarSeries 2, Episode 1

The cyber thriller returns with Simon Pegg and Siân Brooke. At GCHQ, Danny's under pressure dealing with the fallout from the Russian cyber-attack when a bold new threat emerges. (S2 Ep1/6)

The Undeclared War was broadcast on Channel 4 at Tuesday 21 July 2026, 20:00.

Series 2Episode 1
Playback time1:00:00

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The Undeclared War

The Undeclared War is a TV show on Channel 4. Thriller about a leading team of analysts in GCHQ secretly working to ward off a series of cyber-attacks on the UK in post-pandemic 2024. Starring Simon Pegg, Hannah Khalique-Brown and Siân Brooke. The program has been available since 2026. A total of 2 episodes have been broadcast, most recently in July 2026.

Last broadcast:21/07/2026 at 20:00

The Undeclared War catch up

The Undeclared WarSeries 2, Episode 1

The Undeclared War

Catching up on The Undeclared War?