The Undeclared War

Wed, Aug 5 · 47 minutes

Danny puts everything on the line in order to right some wrongs.

Tue, Aug 4 · 43 minutes

Charlie interrogates Barbara, and Danny discovers a clue that turns his life upside down.

Wed, Jul 29 · 48 minutes

A malware attack on British government departments forces Danny and Roz to work together.

Tue, Jul 28 · 48 minutes

Barbara faces an impossible decision when her charming ex-boyfriend Nicky Chan re-appears.

Wed, Jul 22 · 47 minutes

Vadim finds himself working for the Chinese. Danny and Roz clash, and the mole hunt is on.

Tue, Jul 21 · 48 minutes

As Danny deals with the fallout from the Russian cyber-attack, a bold new threat emerges.

Thu, Aug 4 · 47 minutes

As the true extent of Russia's interference with the UK becomes clear, Saara and her former classmate join forces. Can they uncover the hidden code and prevent a war?

Thu, Jul 28 · 47 minutes

Signs of irregularity in the UK general election result prompt political unrest, and the nation's relationship with its allies is threatened. Saara makes a devastating discovery.

Thu, Jul 21 · 47 minutes

With Saara in a difficult position, a revelation forces her hand. Marina moves to London.

Thu, Jul 14 · 56 minutes

Vadim returns to Russia where his allegiances are tested, leading him to a risky stunt.

Thu, Jul 7 · 47 minutes

Saara befriends John, a veteran GCHQ staffer, and seeks help from Gabriel in decrypting a message in the virus. Danny signs off on Saara attending a cyber conference with US agent Kathy, aware that Russian intelligence will also be there.

Thu, Jun 30 · 47 minutes

A young intern's first day at GCHQ coincides with a major cyberattack on the UK. To win her superiors' trust, she breaks ranks to analyse the malware code without permission and uncovers a greater threat missed by others.