Moscow, 1985. The Soviet Union and its communist regime are in the last stages of decline, but remain opaque to the rest of the world - and still very dangerous. In this ever-shifting landscape, a senior KGB officer - code name GAMBIT - has approached the CIA Moscow station chief with top secret military weapons intelligence and asked to be exfiltrated. GAMBIT demands that his handler be a former CIA officer, Alex Garin, a former KGB officer who defected to the American side.

Lisbon, 1943. After escaping from Nazi-Occupied France, SOE agent Elisabeth de Mornay, codename Cecile, receives new orders: she must infiltrate high society in neutral Lisbon and find out who is leaking key information to the Germans about British troop movements. As Solange Verin, a French widow of independent means, she will be able to meet all the rich Europeans who have gathered in Lisbon to wait out the war. One of them is a traitor, and she must find out who before more British servicemen die. 

1989. The fall of the Berlin Wall is imminent and the Cold War will soon be over. But for Box 88, a top secret spying agency known only to an inner circle of MI6 and CIA operatives, the espionage game is heating up. 2020. MI5 hear rumours of Box 88’s existence and go after Kite – only for Iranian intelligence to get to him first. Taken captive and subjected to torture, Kite is presented with a simple choice: reveal the truth about what happened in France 30 years earlier – or watch his family die.

1942: a German spy comes ashore on a desolate stretch of Lincolnshire beach. But he is hunted down by a young detective, Richard Prince. The secret services have need of a man like him.... In occupied Europe, Denmark is a hotbed of problems for British intelligence. Rumours of a war-ending weapon being developed by the Germans are rife. Sent to Copenhagen, Prince is soon caught in a deadly game of cat and mouse. Dodging Gestapo agents, SS muscle and the danger of betrayal, his survival - and the war effort - hangs in the balance. 

When a man’s body is discovered in a Swiss glacier thirty years after he went missing, his son, Foster Treherne, hopes he’ll finally have closure on what happened to the father he never met. But then the autopsy reveals signs of a struggle, and what was assumed to be a tragic accident suddenly looks more sinister. Foster tracks down his father’s old friends, but when he starts to ask questions it becomes clear that there’s something they don’t want to tell him.

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.

East Berlin, 1975: When Oberleutnant Karin Müller is called to investigate a girl's body at the foot of the wall, she realises this is a death like no other. It seems the girl was trying to escape - but from the West. The Stasi want her to discover the identity of the girl but assure Müller the case is otherwise closed. This is not a regime that tolerates a curious mind, and Müller doesn't realise that the trail she's following will lead her dangerously close to home.

September, 1940. The sun is shining, and in the midst of the good weather Londoners could be mistaken for forgetting their country was at war - until the familiar wail of the air-raid sirens heralds an enemy attack. The Blitz has started, and normal life has abruptly ended - but crime has not. That night a man's body is discovered in an unmarked van in the back streets of West Ham. When Detective Inspector John Jago is called to the scene, he recognises the victim: local justice of the peace Charles Villiers. The death looks suspicious, but then a German bomb obliterates all evidence.

Danger and dissent stalk the streets and taverns of Elizabethan England. The queen’s chief spymaster, Francis Walsingham, and his team of agents must maintain the highest levels of vigilance to ward off Catholic plots and the ever-present threat of invasion. One operative in particular - a young Cambridge undergraduate of humble origins, controversial beliefs and literary genius who goes by the name of Kit Marlowe - is relentless in his pursuit of intelligence for the Crown. 

Berlin, 1929. Detective Inspector Rath was a successful career officer in the Cologne Homicide Division before a shooting incident in which he inadvertently killed a man. He has been transferred to the vice squad in Berlin, a job he detests even though he finds a new friend in his boss, Chief Inspector Wolter. There is seething unrest in the city, and the Commissioner of Police has ordered the vice squad to ruthlessly enforce the ban on May Day demonstrations.

As Germany goes to war, the Nazis tighten their terrifying grip. Paranoia in the capital is intensified by a rigidly enforced blackout that plunges the city into oppressive darkness every night, as the bleak winter sun sets. When a young woman is found brutally murdered, criminal Inspector Horst Schenke is under immense pressure to solve the case, swiftly. Treated with suspicion by his superiors for his failure to join the Nazi Party, Schenke walks a perilous line - for disloyalty is a death sentence.

When a teenage boy shoots a young woman dead in the middle of a busy Glasgow street and then commits suicide, Detective Harry McCoy is sure of one thing. It wasn't a random act of violence. McCoy uses his underworld network to lead the investigation but soon runs up against a secret society led by Glasgow's wealthiest family, the Dunlops. McCoy's boss doesn't want him to investigate. The Dunlops seem untouchable. But McCoy has other ideas....

1961. Hidden deep within the forests of central Soviet Russia is a place that doesn’t appear on any map: a city called Arzamas-16. Here a community of dedicated scientists, technicians and engineers are building the most powerful nuclear device the world will ever see - 3,000 times more powerful than Hiroshima. But 10 days before the bomb is to be tested, a young physicist is found dead. His body contains enough radioactive poison to kill thousands. The Arzamas authorities believe it is suicide - they want the corpse disposed of and the incident forgotten.

Camden mortuary assistant Cassie Raven has pretty much seen it all. But this is the first time she's come face to face with someone she knew on the slab. Someone she cared about. Geraldine Edwards, the teacher responsible for her returning to education after she got ensnared in a life of drugs. The woman who acted as a second mother to the orphaned Cassie. Deeply intuitive and convinced that she can pick up the last thoughts of the dead, Cassie senses that there must be more to the ruling of an accidental death. 

Autumn 1943. Hitler knows he cannot win the war: now he must find a way to make peace. FDR and Stalin are willing to negotiate; only Churchill refuses to listen. The upcoming Allied Tehran conference will be where the next steps - whatever they are - will be decided. Into this nest of double- and triple-dealing steps Willard Mayer, OSS agent and FDR's envoy to the conference. His job is to secure the peace that the USA and Hitler now crave. The stakes couldn't be higher.