Episode 1: Episode 1
2026-07-2148 min
As Danny deals with the fallout from the Russian cyber-attack, a bold new threat emerges.
Season guide
The Undeclared War Season 2 — Episodes and Where to Watch
6 episodes · first aired 2026-07-21
The elite Malware Department at GCHQ grapples with the aftermath of a devastating Russian cyber-attack. Just when it seems the UK has gained the upper hand, Danny and his team discover a mole in their midst and uncover a far more dangerous threat.
Episode guide
Episode 2: Episode 2
2026-07-2247 min
Vadim finds himself working for the Chinese. Danny and Roz clash, and the mole hunt is on.
Episode 3: Episode 3
2026-07-2848 min
Barbara faces an impossible decision when her charming ex-boyfriend Nicky Chan re-appears.
Episode 4: Episode 4
2026-07-2948 min
A malware attack on British government departments forces Danny and Roz to work together.
Episode 5: Episode 5
2026-08-0443 min
Charlie interrogates Barbara, and Danny discovers a clue that turns his life upside down.
Episode 6: Episode 6
2026-08-0547 min
Danny puts everything on the line in order to right some wrongs.
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