UK TV · Channel 4
The Undeclared War: all seasons, episodes and where it airs in the UK
Quick answer · UK
The Undeclared War is a UK drama and thriller series from Channel 4, running since 2022, with 2 seasons and 12 episodes.
No new season of The Undeclared War has been confirmed yet; the latest episode aired on Tuesday, July 21, 2026.
The Undeclared War seasons (2 seasons, 12 episodes)
| Season | Episodes | First aired | Last aired |
|---|---|---|---|
| Season 1 | 6 | June 30, 2022 | June 30, 2022 |
| Season 2 | 6 | July 21, 2026 | July 21, 2026 |
Original UK air dates on Channel 4.
Common questions
How many seasons of The Undeclared War are there?
The Undeclared War has 2 seasons and 12 episodes, first airing on Thursday, June 30, 2022.
Is The Undeclared War still on?
No new season of The Undeclared War has been confirmed yet; the latest episode aired on Tuesday, July 21, 2026.
What channel is The Undeclared War on in the UK?
The Undeclared War airs on Channel 4, a streaming service.
Who stars in The Undeclared War?
The main cast includes Simon Pegg, Joss Porter, Hannah Khalique-Brown, Tom McKay.
Source: TVmaze (CC BY-SA), retrieved October 5, 2026.