In the office at MI5 where he works, they call Jonas Merrick 'the eternal flame'. It isn't a compliment. It's because he never goes out. He never goes undercover, never does surveillance, never goes with the teams that kick down the doors or seize the suspects off the street. He commutes into work and sits at his desk and then he goes home. But Jonas has qualities the hot-shots fail to notice: a steely concentration, a ruthless ability to focus and find the enemy hiding in plain sight.

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.

Leningrad, 1951. The shadow of war lingers. Revol Rossel - once a virtuoso violinist with a glittering future - is now a humble state militia cop, forced to investigate desperate crimes in this desperate era. But when five frozen corpses are found neatly arranged between railway lines, Rossel is faced with the most puzzling - and most dangerous - case of his career. His hunt for the truth leads him to the dark heart of Leningrad’s musical establishment, and, ultimately, to the highest levels of the Kremlin itself.  

A new president offers hope to a country weary of conflict. He’s a young, popular, self-made visionary...but he’s also a man with a secret. Halfway across the globe a regional superpower struggles with sanctions imposed by the Great Satan and her European allies, a country whose ancient religion spawned a group of ruthless assassins. Faced with internal dissent and extrajudicial targeted killings by the United States and Israel, the Supreme Leader puts a plan in motion to defeat the most powerful nation on earth.

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. 

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?

It's 1960s London, and spy Joe Wilderness should be living like James Bond. But alas, in the wake of an embarrassing disaster for MI6, Wilderness has been posted to remote northern Finland in a cultural exchange program to promote Britain abroad. Bored and with nothing to spy on, he strikes a deal with his old KGB pal Kostya to smuggle vodka into the USSR - but there is something fishy about Kostya's sudden appearance. Could it be connected to cobalt mining, a critical component in atomic bomb casings? Wilderness's posting is getting more interesting, but more dangerous too.... 

When a daring, high-tech CIA operation goes wrong and is disavowed, Michael Dunne sets out for revenge. CIA operations officer Michael Dunne is tasked with infiltrating an Italian news organization that smells like a front for an enemy intelligence service. Headed by an American journalist, the self-styled bandits run a cyber operation unlike anything the CIA has seen before. Fast, slick, and indiscriminate, the group steals secrets from everywhere and anyone, and exploits them in ways the CIA can neither understand nor stop.

The setting is 1950s London, at the height of the Cold War. Kit Fournier is ostensibly a senior diplomat at the US embassy in Grosvenor Square, but is actually CIA bureau chief in London. The Arms Race informs much of the action in this fast-paced story which sees Kit go undercover to meet a dissident KGB agent, lose a loved one, have a crisis of soul and get blackmailed into becoming a double agent for M16....

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.

Lady Somers is the first woman to head up the Ministry of Defence. She also has something to hide. Catesby’s job is to uncover her story and bury it forever. His quest leads him through the sex scandals of London in the Swinging '60s and then on to Moscow where a shocking message changes everything. His next mission is a desperate hunt through the war-torn jungles of Southeast Asia, where he finally makes a heartbreaking discovery that is as personal as it is political.

The naked corpses of Aylmer and Mary Younis are discovered in their home. The only clues are a note written in blood and an eerie report of two spectral figures departing the crime scene. Officer Jill Ferriter is charged with investigating the murders while her colleague Alex Cupidi is on leave, recovering from post-traumatic stress.

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.

October, 1944: For the 1000 Year Reich, time is running out. Desperate to avoid the humiliation of unconditional surrender, German intelligence launch Operation Finisterre: a last-ditch plan to enable Hitler to deny the savage logic of a war on two fronts.Success depends on two individuals: Stefan Portisch, a German naval officer washed ashore after the loss of his U-boat and Hector Gomez, who was planted at the American atomic bomb complex.

July 1940. As Britain braces itself for invasion, ex-Tommy and safecracker Bill O'Hagan is glad to have escaped the battlefield. But when a job goes wrong, he finds himself forced to serve his country once more. Spurned by his government and fearing for his life, the Duke of Windsor flees to Portugal with the woman for whom he abdicated the throne, Wallis Simpson. As a web of Nazi trickery threatens to ensnare him, his fate and the fate of Britain rest on one man.