On Christmas Eve, DCI Mackenzie Jones is called to a shooting at a remote farmhouse. Ralph Mallender believes his father lies dead inside. When three more bodies are discovered, it's clear a festive family gathering has turned into a gruesome tragedy. At first it seems like an open and shut case: a murder suicide committed by Ralph's volatile brother Cameron. Then new evidence makes Mack suspect the man who reported the crime is in fact the perpetrator. But Mack isn't the only one with a stake in the case.

Alexandra Avellino has just found her father's mutilated body and needs the police right away. She believes her sister killed him and that she is still in the house with a knife. Sofia Avellino has just found her father's mutilated body and needs the police right away. She believes her sister, Alexandra, did it and that she is still in the house, locked in the bathroom. Both women are to go on trial at the same time. A joint trial in front of one jury. But one of these women is lying. One of them is a murderer. 

Pete Riley is a stay-at-home dad; his partner, Maddie, works in advertising. After Pete drops two-year-old Theo off at nursery one morning, he's politely accosted by a man who looks just like Theo. The man, Miles Lambert, breaks the devastating news that Theo is in fact not Pete's son, but his - the two babies got mixed up at hospital and Miles and his wife, Lucy, now have the Rileys' son at home. They've already carried out DNA testing to prove it.

You come home to find your wife missing - and the body of a woman you've never seen in her place. A phone in her hand starts to ring. A voice says you have 24 hours to clear your name; 24 hours to save your wife. But there's only one way to do it. You must kill someone for them. Someone you've never heard of. A complete stranger. And the clock is ticking.

Eva has made a catastrophic mistake. Her career is in tatters. By day, she's tormented by tremors, nosebleeds, and blackouts. By night, her violent dreams leave her shaken. They should. They hold a devastating secret. The truth is more terrifying than her nightmares. Confronting it demands an unthinkable choice. Eva would kill for a baby.

What do you do when you can't run and you can't hide? Lauren's daughter, Zara, witnessed a terrible crime. But speaking up comes with a price, and when Zara's identity is revealed online, it puts a target on her back. The only choice is to disappear. To keep Zara safe, Lauren will give up everything and everyone she loves, even her husband. There will be no goodbyes. Their pasts will be rewritten. New names, new home, new lives. The rules are strict for a reason. They are being hunted. One mistake - a text, an Instagram like - could bring their old lives crashing into the new.

A windowless shack in the woods. Lena's life and that of her two children follows the rules set by their captor, the father: meals, bathroom visits, study time are strictly scheduled and meticulously observed. He protects his family from the dangers lurking in the outside world and makes sure that his children will always have a mother to look after them. One day Lena manages to flee - but the nightmare continues. It seems as if her tormentor wants to get back what belongs to him.... 

Sandbeach, South Wales. Two women have come forward to make historical sexual allegations against a pillar of the local community, Matthew Cooper. And child-safeguarding protocol demands that Social Services remove the accused from his home and his family while a formal assessment is carried out. The Cooper case lands on the desk of inexperienced Social Worker Kit Goddard. Although intrepid and intuitive, she is ill-prepared for such a high-profile case. 

It was supposed to be the happiest day of her life. Zoe was sitting in her hotel room, in her perfect white dress, looking forward to the moment when she would make kind, handsome Toby her husband. Then, there was a blank. They said she must have fainted, overcome with emotion. But nothing felt quite right afterward. Did something happen in that missing time? 

Their bond was unbreakable. The truth was unimaginable. When Beatrice receives a call to say that her sister, Tess, is missing, she boards the first flight home. But as she learns about Tess’s disappearance, she is stunned to discover how little she actually knows of her sister's life. Everyone around her accepts they have lost Tess, but Beatrice refuses to give up, embarking on a dangerous journey to discover the shocking truth, whatever the cost...

Ursula is unable to face up to the tragedy that consumes her, her world has shrunk to an almost unrecognisable state. Then Alice, who’s in the first flush of her relationship with Simon who seems perfectly normal – except that he flinches at the slightest touch. And Gareth, who lives a humdrum life as he struggles to cope with his mum’s increasing dementia. She can’t remember much about her days – not even when a postcard from his long-dead father comes through the door. None of these three strangers have ever met, but their worlds will soon collide.

Brendan Foley has worked to balance the responsibilities of a demanding job and a troublesome family. He’s managed to keep these two worlds separate, until the discovery of a mass grave sends them into a headlong collision. When one of the dead turns out to be a familiar face, he’s taken off the case. Iona Madison keeps everything under control. She works hard as a detective sergeant and trains harder as a boxer. But when her superior, DI Foley, is removed from the case, her certainties are tested like never before. 

A serial killer is burning people alive in the Lake District's prehistoric stone circles. He leaves no clues, and the police are helpless. When his name is found carved into the charred remains of the third victim, disgraced detective Washington Poe is brought back from suspension and into an investigation he wants no part of. He is reluctantly partnered with brilliant but socially awkward civilian analyst Tilly Bradshaw, and the mismatched pair uncover a trail that only he is meant to see. The elusive killer has a plan, and for some reason Poe is part of it.

Lydia Fitzsimons lives in the perfect house with her adoring husband and beloved son. There is just one thing Lydia yearns for to make her perfect life complete, though the last thing she expects is that pursuing it will lead to murder. However, needs must - because nothing can stop this mother from getting what she wants....

Haunted by his inability to track down and save his missing wife, DCI Robert Kett leaves the Metropolitan Police behind and moves to Norwich with his three young children, hoping to heal their broken family. But his newfound peace doesn’t last. Two newspaper delivery girls have gone missing in the city, and the clues point to a serial kidnapper. Kett is dragged into the centre of one of the darkest cases of his career - a case that pits him head-to-head against a horrifying evil.