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The Undeclared War · TV Tonight

The Undeclared War

2022 · Channel 4 · To Be Determined

The Undeclared War

DramaThriller

Set in 2024, The Undeclared War tracks a leading team of analysts buried in the heart of GCHQ, secretly working to ward off a series of cyber-attacks on the UK in the run up to a general election. When a routine stress test of internet infrastructure goes awry 21-year-old GCHQ intern Saara Parvin suddenly finds herself operating on the invisible frontier of high-stakes cyber warfare.

When & where

Channel 4Streaming · United Kingdom

No upcoming episode has been announced yet.

Last aired

S02E06 · Episode 6

2026-07-21

Watch on Channel 4 →

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TVmaze users: 7.3/10

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Latest news

Episodes

E01
Episode 1
2026-07-21 · 48 min
E02
Episode 2
2026-07-21 · 47 min
E03
Episode 3
2026-07-21 · 48 min
E04
Episode 4
2026-07-21 · 48 min
E05
Episode 5
2026-07-21 · 43 min
E06
Episode 6
2026-07-21 · 47 min

Cast

Simon Pegg
Danny Patrick
Joss Porter
Phil Draper
Hannah Khalique-Brown
Saara Parvan
Tom McKay
Max Kelly
Alex Jennings
David Neal

German Segal

Vadim Trusov

Ed Stoppard

Ed Stoppard

Richard Marston

Adrian Lester

Adrian Lester

Andrew Makinde

Maisie Richardson-Sellers

Maisie Richardson-Sellers

Kathy Freeman

Edward Holcroft

Edward Holcroft

James Cox

Siân Brooke

Siân Brooke

Barbara Napier

Danny Sapani

Danny Sapani

Charlie Francis

H@hannahkhaliquebrownHannah Khalique-Brown
M@maisiersellersMaisie Richardson-Sellers
S@simonpeggSimon Pegg

Browse #theundeclaredwar on Instagram →

The Undeclared War review – Simon Pegg’s cyber-attack thriller fails to push any of the right buttons
The Guardian · Jul 22, 2026
'The Undeclared War' Season 2 Trailer Puts Simon Pegg in the Spotlight
TV Insider · Jul 21, 2026
The Undeclared War
Plugged In · Sep 2, 2026
'The Undeclared War' Season 2 Release Schedule: How To Watch And When New Episodes Air On Channel 4
ELLE · Jul 21, 2026
The Undeclared War stars reveal whether the show could return for a third season
Radio Times · Jul 23, 2026
"A stellar cast facing a dangerous threat": The Undeclared War is back and perfect for The Night Manager fans
Cosmopolitan · Jul 13, 2026
Simon Pegg's Criminally Overlooked Thriller Is Officially Moving Forward With Season 3
Collider · Jul 26, 2026
The Undeclared War review — series two of the spy drama has a new enemy
The Times · Jul 21, 2026