When disgraced spy Solomon Vine's friend and rival Gabriel Wilde vanishes without trace, it's only Vine who might be able to discover what has happened to him. A single missing file holds the key. That, too, is gone. But its contents, Vine is told, are incendiary. There were few Wilde could trust. And being one of them appears to have fatal consequences. But as Vine's off-the-books investigation begins to reveal the shocking truth, he realizes there's much more at stake than one man's life.

Moscow, 1936. In a deconsecrated church, a young woman is found dead, her mutilated body displayed on the altar for all to see. Captain Alexei Dimitrevich Korolev is asked to investigate. But when he discovers that the victim is an American citizen, the NKVD - the most feared organisation in Russia - becomes involved. Soon, Korolev’s every step is under close scrutiny and one false move will mean exile to the frozen camps of the far north. Committed to uncovering the truth, Korolov enters the realm of the Thieves, who run Moscow’s underworld. 

Prague, 1599. Christian Stern, a young doctor, has just arrived in the city. On his first evening, he finds a young woman's body half buried in the snow. The dead woman is none other than the emperor's mistress, and there's no shortage of suspects. Stern is employed by the emperor himself to investigate the murder. In the search to find the culprit, Stern finds himself drawn into the shadowy world of the emperor's court - unspoken affairs, letters written in code, and bitter rivalries. But can he unmask the killer before they reach their next victim?

The intelligence service puts two years and over £100k into the training of new field officers. You're shown how to steal cars, strip weapons, hack bank accounts. There are courses on the use of blackmail and improvised explosives, two workshops solely dedicated to navigating by the stars. But nothing about what I had heard one old spy call whiplash. No one tells you how to go home.

From the refugee camps of Greece to the mountains of Macedonia, a 13-year-old boy is making his way to Germany and safety. Codenamed 'Firefly', he holds vital intelligence: unparalleled insight into a vicious ISIS terror cell and details of their plans. But the terrorists are hot on his trail, determined he won't live to pass on the information. When MI6 become aware of Firefly and what he knows, the race is on to find him. Luc Samson, ex-MI6 agent and now private eye, finds himself recruited to the cause. Fluent in Arabic thanks to his Lebanese heritage, Samson's job is to find Firefly, win his trust and get him to safety.

Slough House is Jackson Lamb’s kingdom; a dumping ground for members of the intelligence service who’ve screwed up: left a secret file on a train, blown surveillance, or become drunkenly unreliable. They’re the service’s poor relations – the slow horses – and bitterest among them is River Cartwright, whose days are spent transcribing mobile phone conversations.

Berlin. 1963. The height of the Cold War and an early morning spy swap. On one side of the trade: Martin Keller, an American physicist who once made headlines, but who then disappeared into the English prison system. Keller's most critical possession: his American passport. Keller's most ardent desire: to see his ex-wife, Sabine, and their young son. But Martin has questions: who asked for him? Who negotiated the deal? Just the KGB bringing home one of its agents? Or, as he hopes, a more personal intervention? 

Things change quickly in the world of espionage and clandestine operations. Jude Lyon of MI6 remembers the captured terrorist bomb-maker. He watched him being flown off to Syria, back when Syria was 'friendly'. No one expected him to survive interrogation there. Yet the man is alive, and someone has broken him out of jail.

Attempting to rebuild her shattered life in the South of France, former MI6 operative Kate Henderson receives an unexpected and most unwelcome visit from an old adversary: the UK prime minister. He has an extraordinary story to tell - and he needs her help. A Russian agent has come forward with news that the PM has been the victim of the greatest misinformation play in the history of MI6. It's run out of a special KGB unit that exists for one purpose alone: to process the intelligence from 'Agent Dante', a mole right at the heart of MI6 in London.

They killed Robert Harland today, and they're going to kill the rest of you. This is the warning private investigator Paul Samson receives right after Joni Fremantle, the woman he has been guarding for a mysterious client, gives him the slip. No time to worry about that now: his life, and those of Denis Hisami, Anastasia Christakos and even the young Syrian Naji, is on the line. Samson is sure he knows why - to expose a company supplying funds to far-right groups across Europe is to paint a target on your own back.

Tom Bettany is working at a meat processing plant in France when he gets a voicemail telling him that his estranged 26-year-old son is dead. Liam Bettany fell from his London balcony, where he was smoking dope. Now, for the first time since he cut all ties years ago, Bettany returns home, to find out the truth about his son's death. But more than a few people are interested to hear Bettany is back in town. He might have thought he'd left it all behind when he first skipped town, but nobody really just walks away.

In 1988, Harry made one mistake: he took a bribe, letting a man he knew as Igor into Britain - and he’s regretted it ever since. So when he recognises Igor many years later as his newly elected MP, he knows he has to come clean. But the MP recognises him, too - and Harry fears what he might do next.

Jeremy Summers, a British banker with a secret that could reveal MI6 intelligence sources involved in the war against drug-funded terrorism, has been seized at gunpoint, in broad daylight, on the streets of west London. An old contact, Raglan - an Englishman who served in the French Foreign Legion - is on his trail. Raglan's pursuit will lead him to the winter-ravaged wasteland of a remote Russian penal colony. A place that holds Russia's most brutal murderers. A place of death and retribution. How will he get in? More importantly, how will he get out...alive?

1993: student Lachlan Kite is sent to post-Soviet Russia in the guise of a language teacher. In reality, he is there as a spy. Top secret intelligence agency BOX 88 has ordered Kite to extract a chemical weapons scientist before his groundbreaking research falls into the wrong hands. But Kite’s mission soon goes wrong and he is left stranded in a hostile city with a former KGB officer on his trail.

Lyndsey was once a top handler in the Moscow Field Station, where she was known as the "human lie detector" and praised for recruiting some of the most senior Russian officials. But now, three Russian assets have been exposed - including one of her own - and the CIA is convinced there's a mole in the department. With years of work in question and lives on the line, Lyndsey is thrown back into life at the agency, this time tracing the steps of those closest to her.