Episode guide
The Undeclared War: Series 2
6 episodes · premiered Jul 21, 2026
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 1: Episode 1 Jul 21, 2026 · 48m As Danny deals with the fallout from the Russian cyber-attack, a bold new threat emerges.
- Episode 2: Episode 2 Jul 22, 2026 · 47m Vadim finds himself working for the Chinese. Danny and Roz clash, and the mole hunt is on.
- Episode 3: Episode 3 Jul 28, 2026 · 48m Barbara faces an impossible decision when her charming ex-boyfriend Nicky Chan re-appears.
- Episode 4: Episode 4 Jul 29, 2026 · 48m A malware attack on British government departments forces Danny and Roz to work together.
- Episode 5: Episode 5 Aug 4, 2026 · 43m Charlie interrogates Barbara, and Danny discovers a clue that turns his life upside down.
- Episode 6: Episode 6 Aug 5, 2026 · 47m Danny puts everything on the line in order to right some wrongs.