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.

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?

A young meteorologist checking a mountain top weather station in Kinlochleven discovers the body of a missing man entombed in ice. Cameron Brodie, a Glasgow detective, sets out on a hazardous journey to the isolated and ice-bound village. He has his own reasons for wanting to investigate a murder case so far from his beat. Brodie must face up to the ghosts of his past and to a killer determined to bury forever the chilling secret that his investigation threatens to expose.

London, 1923. Newly minted research assistant Saffron Everleigh is the first woman to hold the position at University College of London. When she attends a dinner party for the school, she expects to engage in conversations about the university's large expedition to the Amazon. What she doesn’t expect is for Mrs. Henry, one of the professors’ wives, to drop to the floor, poisoned by an unknown toxin. Dr. Maxwell, Saffron’s mentor, is the main suspect, and evidence quickly mounts.

Rowland Sinclair is an artist and a gentleman. In Australia's 1930s, the Sinclair name is respectable and influential, yet Rowland has a talent for scandal. He relies on the Sinclair fortune to indulge his artistic passions and friends: a poet, a painter and a brazen sculptress. Mounting tensions fuelled by the Great Depression take Australia to the brink of revolution, but Rowland Sinclair is indifferent to the politics...until a brutal murder exposes an extraordinary and treasonous conspiracy.

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.

Singapore, 1910 - Desperate for a fresh start, Harriet Gordon finds herself living with her brother, a reverend and headmaster of a school for boys, in Singapore at the height of colonial rule. Hoping to gain some financial independence, she advertises her services as a personal secretary. It is unfortunate that she should discover her first client, Sir Oswald Newbold - explorer, mine magnate, and president of the exclusive Explorers and Geographers Club - dead with a knife in his throat.

His code name was “The Needle.” He was a German aristocrat of extraordinary intelligence - a master spy with a legacy of violence in his blood, and the object of the most desperate manhunt in history.... But his fate lay in the hands of a young and vulnerable English woman, whose loyalty, if swayed, would assure his freedom - and win the war for the Nazis....

“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.

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.

First-year detective Kathleen Doyle is a plucky Irish redhead of humble origins and modest means. Chief Inspector Michael Acton is her antithesis: a British lord turned cop. He's tall, handsome, and enigmatic - to a fault. He also has a knack for solving London's most high-profile crimes. Acton selects Doyle out of the newbie squad to partner with him on a series of investigations because she always knows when someone is lying - a trait that comes in handy when interviewing suspects and witnesses.

Deep in the trenches of Flanders Fields, men are dying in the thousands every day. So one more death shouldn't be a surprise. But then a body turns up with bizarre injuries, and Sherlock Holmes' former sidekick, Dr. John Watson - unable to fight for his country due to injury but able to serve it through his medical expertise - finds his suspicions raised.

January 1921. Though the Great War is over, in Ireland a new civil war is raging. The once-grand Kilcolgan House, a crumbling bastion shrouded in sea mist, lies half empty and filled with ghosts, both real and imagined, while it shelters the surviving members of the Prendeville family. Then, when an IRA ambush goes terribly wrong, Maud Prendeville, Lord Kilcolgan’s eldest daughter, is killed, leaving the family reeling. Yet the IRA column behind the attack insists they left her alive, that someone else must be responsible for her terrible fate.

In 1921, the bloodied bodies of Colonel Fletcher, his wife and two staff are found in a manor house in Surrey. The police have put the murders down to a violent robbery, but Detective Inspector Madden from Scotland Yard has his own suspicions. In the meantime the killer is plotting his second strike.

What's a 22-year-old Irish American cop who's never been out of Massachusetts before doing at Beardsley Hall, an English country house, having lunch with King Haakon of Norway? Billy Boyle himself wonders. Back home in Southie, hed barely made detective when war was declared. Unwilling to fight and perhaps die for England, he was relieved when his mother wangled a job for him on the staff of a general married to her distant cousin.