From the refugee camps of Greece to the mountains of Macedonia, a 13-year-old boy is making his way to Germany and to 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.

Paul Samson is living in London and picking up some extra work for a private security company when he is almost killed by a thuggish assassin while tailing a mysterious and gifted young employee of a powerful environmental NGO. The murder of legendary spy Robert Harland, the poisoning of billionaire philanthropist Denis Hisami with a neurotoxin in the United States House of Representatives, and a second attempt on Samson's own life send him on the run to Estonia to figure out who is trying to kill him, and why.

Constantine Lindow is waiting for his brother Eamonn outside a central London tube station when a bus turns into the street and explodes. The next day Con is arrested as the prime suspect for the bombing. Con is determined to prove his innocence, but the only way he can do that is to find the real bomber. As he digs deeper, he finds himself confronted by his own brother's secret life—and the cold-blooded killers from his past.

On a deserted road in Calabria, Greek aid worker Anastasia Cristakos is driving alone to visit one of the new refugee centers funded by billionaire Denis Hisami, whom she has recently married. She slows down to greet two African migrants she recognizes. Too late she realizes they are not her friends. This is an ambush. She manages a desperate phone call to Hisami before her Mafia kidnappers silence her with a powerful drug. Hours later she wakes up in the pitch dark on a container ship, powering eastward across the Mediterranean.

Two years ago, a hostile Prime Minister launched the Monochrome inquiry, investigating "historical over-reaching" by the British Secret Service “to investigate historical over-reaching.” Monochrome’s mission was to ferret out any hint of misconduct by any MI5 officer—and allowed Griselda Fleet and Malcolm Kyle, the two civil servants seconded to the project, unfettered access to any and all confidential information in the Service archives in order to do so. But MI5’s formidable First Desk did not become Britain’s top spy by accident, and she has successfully thwarted the inquiry at every turn.

Only she knows the truth. Only he can tell the world. Vienna, 1946. A brilliant German scientist spirited out of the ruins Nazi Europe in search of a new life. Moscow, 1964. A rising star of the British diplomatic service whose job is not what it seems. London, the present day. A once promising academic offered an opportunity to seal his place in history. Their stories, their lives, and the fate of the world, are bound by a single document: The Scarlet Papers. The devastating secrets contained within teased by a brief invitation: Tomorrow 11AM. Take a cab and pay in cash. Tell no one.

Lachlan Kite is a member of BOX 88, an elite transatlantic black-ops outfit so covert that not even MI6 and the CIA are certain of its existence - but even the best spy can't anticipate every potential threat in a world where dangerous actors lurk around every corner. At the funeral of his childhood best friend, Lachlan falls into a trap that drops him into the hands of a potentially deadly interrogation, with his pregnant wife, also abducted, being held as collateral for the information he's sworn on his own life to protect.

Northern Ireland, spring 1981. Hunger strikes, riots, power cuts, a homophobic serial killer with a penchant for opera, and a young woman’s suicide that may yet turn out to be murder: on the surface, the events are unconnected, but then things—and people—aren’t always what they seem. Detective Sergeant Duffy is the man tasked with trying to get to the bottom of it all. It’s no easy job—especially when it turns out that one of the victims was involved in the IRA but was last seen discussing business with someone from the loyalist Ulster Volunteer Force.

After the assassination of his wife and son, Gabriel Allon retires from his brutal anti-terrorist career and loses himself in his previous cover job: art restoration. But when Tariq al-Hourani, the Palestinian terrorist responsible for his family’s death, begins a killing spree designed to destroy Middle East peace talks, Gabriel once again slips into the shadowy world of international intrigue. In a global game of hide-and-seek, the motives of Gabriel and Tariq soon become more personal than political.

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.

“In wartime,” Winston Churchill wrote, “truth is so precious that she should always be attended by a bodyguard of lies.” For Britain’s counterintelligence operations, this meant finding the unlikeliest agent imaginable - a history professor named Alfred Vicary, handpicked by Churchill himself to expose a highly dangerous, but unknown, traitor. The Nazis, however, have also chosen an unlikely agent.

On the vacation of a lifetime in Egypt, an elderly French couple are brutally murdered. Days later, a meticulously planned kidnapping takes place on the streets of Paris. Amelia Levene, the first female Chief of MI6, has disappeared without a trace, six weeks before she is due to take over as the most influential spy in Europe. It is the gravest crisis MI6 has faced in more than a decade. Desperate not only to find her, but to keep her disappearance a secret, Britain’s top intelligence agents turn to one of their own: disgraced MI6 officer Thomas Kell.

West Berlin, 1979. Helen Abell oversees the CIA's network of safe houses, rare havens for field agents and case officers amidst the dangerous milieu of a city in the grips of the Cold War. Helen's world is upended when, during her routine inspection of an agency property, she overhears a meeting between two unfamiliar people speaking a coded language that hints at shadowy realities far beyond her comprehension. Before the day is out, she witnesses a second unauthorized encounter, one that will place her in the sight lines of the most ruthless and powerful man at the agency.

A reluctant ex-spy with demons of her own, Elinor finds herself facing down one of the most dangerous organized crime gangs in London, ultimately exposing corruption from Scotland Yard to the highest levels of government. The private, quiet “Miss White" as Elinor is known, lives in a village in rural Kent, England, and to her fellow villagers seems something of an enigma. Well she might, as Elinor occupies a "grace and favor" property, a rare privilege offered to faithful servants of the Crown for services to the nation.

1660 England. General Edward Whalley and his son-in law Colonel William Goffe board a ship bound for the New World. They are on the run, wanted for the murder of King Charles I—a brazen execution that marked the culmination of the English Civil War, in which parliamentarians successfully battled royalists for control.

From the refugee camps of Greece to the mountains of Macedonia, a 13-year-old boy is making his way to Germany and to 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.

Robert Harland ended his career as a British spy in an Austrian hospital, after being tortured and beaten by Czech security agents in the last days of the communist regime. He was young enough then to find a new life with the Red Cross and then with the UN.

On a deserted road in Calabria, Greek aid worker Anastasia Cristakos is driving alone to visit one of the new refugee centers funded by billionaire Denis Hisami, whom she has recently married. She slows down to greet two African migrants she recognizes. Too late she realizes they are not her friends. This is an ambush. She manages a desperate phone call to Hisami before her Mafia kidnappers silence her with a powerful drug. Hours later she wakes up in the pitch dark on a container ship, powering eastward across the Mediterranean.

Slim Parsons is all but burned. When her last deep-cover job for MI5 ended with a life-and-death struggle on a private jet, she went on the run from her deadly target–a conniving businessman and money launderer codenamed “Hagfish." Now she's back at home, in hiding from her angry bosses in the Security Service, who have accused her of being overly violent and unsuitable for the role of an MI5 operative. But after several months off the grid, Slim is called back to another job–Operation Linesman–where she is asked to infiltrate a news website.

Constantine Lindow is waiting for his brother Eamonn outside a central London tube station when a bus turns into the street and explodes. The next day Con is arrested as the prime suspect for the bombing. Con is determined to prove his innocence, but the only way he can do that is to find the real bomber. As he digs deeper, he finds himself confronted by his own brother's secret life—and the cold-blooded killers from his past.