Cambridge, 1939. The opening weeks of the Second World War, and the first blackout - The Great Darkness - covers southern England, enveloping the city. Detective Inspector Eden Brooke, a wounded hero of the Great War, takes his nightly dip in the cool waters of the Cam. Daylight reveals a corpse on the riverside, the body torn apart by some unspeakable force.

In the bleak snowbound landscape of the Cambridgeshire Fens, a car is winched from a frozen river. Inside, locked in a block of ice, is a man's mutilated body. Later, high on Ely Cathedral, a second body is found, grotesquely riding a stone gargoyle. The decaying corpse has been there more than 30 years. When forensic evidence links both victims to one awful event in 1966, local reporter Philip Dryden knows he's on to a great story. But as his investigations uncover some disturbing truths, they also point towards one terrifying foggy night in the Fens two years ago.

The charmingly eccentric Otto Draxinger appears to be your typical pipe-smoking Oxford professor, doing his best to preserve his sanity while his beloved former students are being slaughtered at the Western Front. But the American expatriate has diagnosed himself with the newly coined term “schizophrenia”. And he believes the nightmarish waking visions he’s been experiencing are caused by the psychological trauma of the catastrophe that is The Great War.

When newlyweds Agnes and Andrew Kinghof are present for the discovery of an over-ripe corpse in the air-raid shelter of their apartment building, the two set out to put their amateur detective skills to work. The dead man's sister is nearly frightened to death by the appearance of a grinning pig's head outside her window, and she claims to be threatened by someone calling himself 'The Pig'. The newlyweds deduce that it must be someone who lives in the same apartment building.

Nestled high in the Tuscan hills lies Villa Volpone, home to renowned crime writer Jonah Moore and his creative writing course. It’s also the last place retired DCI Dan Armstrong expected to spend his retirement! Dan’s no writer, but maybe this break will help him to think about the next chapter in his own life story? But only days into the course, Jonah Moore is found stabbed to death with his award-winning silver dagger! And Dan finds himself pulled out of retirement with a killer to catch.

It is a dark and misty night, and bachelors Nicholas and Ian are driving to the ball at Fordings, a beautiful concert hall in the countryside. There waits the charming Dilys Maine, and a party buzzing with rumours of one Rosemary Reeve who disappeared on the eve of this event the previous year. With thoughts of this mysterious case ringing in their ears, Dilys and Nicholas strike a stranger on the drive back home, launching a new investigation and unwittingly reviving the search for what really became of Rosemary Reeve.

Ian Rutledge returns to his career at Scotland Yard after years fighting in the First World War. Unknown to his colleagues he is still suffering from shell shock, and is burdened with the guilt of having had executed a young soldier on the battlefield for refusing to fight. A jealous colleague has learned of his secret and has managed to have Rutledge assigned to a difficult case which could spell disaster for Rutledge whatever the outcome. A retired officer has been murdered, and Rutledge goes to investigate.

Iceland, 1956. Fourteen-year-old Lára decides to spend the summer working for a couple on the small island of Videy, just off the coast of Reykjavík. In early August, the girl disappears without a trace. Time passes, and the mystery becomes Iceland‘s most infamous unsolved case. What happened to the young girl? Is she still alive? Did she leave the island, or did something happen to her there? Thirty years later, as the city of Reykjavík celebrates its 200th anniversary, journalist Valur Robertsson begins his own investigation into Lára's case.

Rudi Graf is an engineer who always dreamed of sending rockets to the moon. But instead, he finds himself working alongside Wernher von Braun, launching V2 rockets at London for the Nazis from a bleak seaside town in occupied Holland. As the SS increases its scrutiny of the project, Graf, an engineer more than a soldier, has to muster all of his willpower to toe the party line. And when rumors of a defector circulate through the German ranks, Graf becomes a prime suspect.

Mourning the loss of his wife, Rita, former NYPD homicide detective Nico Doyle moves to her hometown of Gravigna in the winesoaked region of Chianti. Half Italian and half Irish, Nico finds himself able to get by in the region with the help of Rita’s relatives, but he still feels alone and out of place. He isn’t sure if it’s peace he’s seeking, but it isn’t what he finds. Early one morning, he hears a gunshot and a dog's cries near his cabin and walks out to discover a dead body in the woods, flashily dressed in gold tennis shoes.

Probationary constable Peter Grant dreams of being a detective in London's Metropolitan Police. Too bad his superior plans to assign him to the Case Progression Unit, where the biggest threat he'll face is a paper cut. But Peter's prospects change in the aftermath of a puzzling murder, when he gains exclusive information from an eyewitness who happens to be a ghost. Peter's ability to speak with the lingering dead brings him to the attention of Detective Chief Inspector Thomas Nightingale....

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.

Olivia Denis is a content young wife with a carefree life in late 1930s London. Then her world is shattered with the violent death of her husband, Reggie. The police want to call it a suicide and close the case, but Olivia knows Reggie couldn't possibly have fired the fatal shot. Further mysteries surface surrounding her husband's death. Did the trustworthy Foreign Office employee betray government secrets? Was his murder linked to the death of a German embassy clerk the same night? And who searched their flat?

DS George Cross can be rude, difficult and awkward with people. But his unfailing logic and dogged pursuit of the truth means his conviction rate is the best on the force. So when his police colleagues dismiss the death of a man as a squabble among Bristol's homeless community, Detective Sergeant George Cross is not convinced.

A brilliant and ruthless Nazi master agent is on the loose in Cairo. His mission is to send Rommel’s advancing army the secrets that will unlock the city’s doors. In all of Cairo, only two people can stop him. One is a down-on-his-luck English officer no one will listen to. The other is a vulnerable young Jewish girl....