Leah and her three best friends get changed into their pyjamas, eat pizza, and argue about what film to watch. They laugh together, until the early hours. But the next morning, Leah blinks open her eyes and sees three empty sleeping bags. The other girls are gone. Twenty years later. In her small hometown, still-haunted Leah has never been able to shake off the rumours and whispers. How could she have slept through it all? She must know what happened.

I stare at the newspaper article about a baby snatched from the back of a car 30 years ago and wonder why someone would post it through my door. Looking closer, my blood freezes. The little girl in the photo has an unusual scar - just like mine. I’ve never met anyone with one like it. Is this stolen child...me? Trembling with shock, I know I have to confront my mother. My parents got me through a horrific accident, helped me find a job I love teaching art, and even with buying my own house. But was it all built on lies?

I return home to our beautiful house on a chilly winter evening expecting to find my handsome husband Richard waiting for me by the fire. We’re still so in love, and he always takes care of me. He usually comes straight back from work. But tonight, our antique clock ticks on through the dark evening, with no sign of him. Then a knock at the door shatters my perfect life. A 12-year-old-girl, Alice from the village, has been found unconscious in the field behind our house. They say she was last seen getting into Richard’s car.

When six-year-old Olivia Adams disappeared from her back garden, the small community of Stoneridge was thrown into turmoil. How could a child vanish in the middle of a cozy English village? Thirteen years on and Olivia is back. Her mother is convinced it's her but not everyone is sure. If this is the missing girl, then where has she been - and what happened to her on that sunny afternoon? If she's an imposter, then who would be bold enough to try to fool a child's own mother - and why?

Seventeen-year-old Eleanor Parker wakes up cold and alone in the river that twists through her quiet village. She has no memory of how she got there. But she does know that another girl was drowned in the same river the summer before, held under the water by an unknown killer. Determined to unlock the mystery of what really happened to her, Eleanor can't escape the feeling that something awful links her to the previous summer's murder. But will she find out the truth before it’s too late?

I pinch the screen to zoom until I’m staring at the face of a ghost. A man with very short hair, staring directly at the camera with piercing brown eyes. He is as he was when I last saw him: wrinkles around the corners of the eyes and a knowing smirk. That’s the expression I see when I can’t sleep. My body tenses. It can’t be him. It’s not my ex-husband. It’s not David. I know that better than anyone because he didn’t walk out on me. He didn’t disappear two years ago and he’s not a missing person. I know that for a fact because I’m the one who killed him.

Charley Willis was 13 years old when her parents were killed in their family home and she was found hiding in a cupboard upstairs. Fifteen years later, Charley is marrying Seth Chambers. It should be the happiest day of their lives, a chance for Charley to put her past behind her, but just hours after the ceremony, she is missing. No one saw her leave. No one knows where she is. One thing is for certain…Seth is about to discover he doesn’t really know the woman he just married. And his nightmare is only just beginning.

Lucy gets the same bus every day. She hopes to get a seat to herself, tries to avoid eye contact, and, if she’s really lucky, reads a chapter of her book. But it’s a Friday - and the bus is always crammed at the end of the week. Personal space doesn’t exist. She keeps her elbows close and clings to a pole at every juddering stop. When she gets off, something feels different. An envelope stuffed with thousands of pounds is in her bag. Is it the answer to her prayers, or the beginning of a nightmare? Because, in the end, everything has a price.

On a beautiful island, under the Mediterranean sun, two families enjoy a well-deserved holiday. Then, one balmy evening, Emma's father is found unconscious on the sand. Everyone is hiding secrets. Who will you believe?

Rose Denton wakes up in her car. She has no memory of how she got there. But she knows something bad happened.... There’s blood on the windscreen and bonnet - but it’s not hers, and there’s no sign of anything or anyone she might have hit. The last thing she remembers is being in a hotel on a business trip, but now she’s miles away. Back home, her daughter’s boyfriend is missing. The last thing he did was argue with Rose over money. He left no note, no text, no clue as to his whereabouts. The police have questions - and so does Rose.

Everyone’s invited. Someone will never leave. In a grand townhouse rented specially for the evening, Hannah beams at her guests under the sparkling chandelier. Her sisters, her mother and aunt, her best friends...although she’ll miss them all so much when she moves away, tonight is about celebrating the happy times and raising a toast to the future. But the next morning, one of the guests is found cold and lifeless in their pristine white bed. Hannah is desperate to call the police. After all, it must have been an accident.

The doorbell rings, just days after my beloved husband’s sudden death. I don’t recognise the woman on our doorstep, with her blonde highlights, a diamond bracelet identical to my own and a bouncing baby boy in her arms. As I show her inside, I notice her eyes grow wide as she takes in our spacious hallway, and the big squashy sofas that we all used to pile on. She glances at the silver-framed family photos and my little daughter hiding behind my skirts. She looks at me, her blue eyes serious. ‘I’m sorry’ she says. ‘I am your husband’s girlfriend. And this is his son.'

Deborah Jenkins pulls her coat around her as she sets out on her short walk home in the pouring rain. But she never makes it home that night. And she is never seen again.

Four years later, an abandoned baby girl is found wrapped in dirty rags on a doorstep. An anonymous phone call urges the police to run a DNA test on the baby. But nobody is prepared for the results. The newborn belongs to Deborah. She’s still alive.

The white-washed Italian villa is perfect. I thought it might feel odd, living in a stranger’s house for the summer, but as my husband and children swim in the infinity pool, I start to relax. And then, in the back of a wardrobe, I find something that shatters everything.... Sparkling green eyes, square jaw, lopsided smile. A young man with his arm around a beautiful woman. The picture is old and faded, but I’d recognize him anywhere. The man is my husband.

Emma can’t sleep. It’s been like this since her big 4-0 started getting closer. Her mother stopped sleeping just before her own fortieth birthday. She went mad and did the unthinkable because of it. Is that what’s happening to Emma?

Dear Elizabeth, I've been watching you. I hope to see you...soon. Liz Cafferky is on the up. Rescued from her dark past by the owner of a drop-in centre for older men, Liz soon finds herself as the charity's face - and the unwilling darling of the Dublin media. Amidst her claustrophobic fame, Liz barely notices a letter from a new fan. But then one of the centre's clients is brutally murdered, and Elizabeth receives another, more sinister note. Running from her own ghosts, Liz is too scared to go to the police.

When Simon Serrailler was a rookie constable with the Met, he did something reckless in the course of a night's work which caused a man's death. But his act was praised by his colleagues, and he was called a hero. Years later, now a detective chief superintendent who has been badly injured in the course of duty, he receives a medal for bravery at Buckingham Palace while recollecting that fateful night of his early career, when chance disguised itself as bravery.

Owen Hall drives into a petrol station to let his passenger use the facilities. She never comes back - and what's more, it seems she never even made it inside. When Owen raises a fuss, the police are called - and soon identify Owen himself as a possible culprit, not least because they already have him in the frame for another more sinister crime. Owen's always been a little different, and before long others in the community are baying for his blood. But this is a case where nothing is as it seems - least of all Owen Hall....

Eight-year-old Grace is last seen in a sweetshop. Her mother, Emma, is living a nightmare. But as her loved ones rally around her, cracks begin to emerge. What are the emails sent between her husband and her sister? Why does her mother take so long to join the search? And is there more to the disappearance of her daughter than meets the eye?

Astrid Bell has known most of her roommates for years, but while they have a history together - romantic pairings, one-night stands, friendships - each of them also has a past. Astrid is on her way home one day when her neighbor knocks her off her bike. Seeing she is bruised but not broken, her roommates help her home. The next day, they learn that same neighbor was beaten to death hours later. Each of them tells the police what they know and are dismissed - until Astrid stumbles over another body.

'It's been 11 months since I sat in my teenage bedroom and my mundane life was cast into madness. I suppose you could argue it was a lot longer if you include the 30-year trip back to 1986.' After his miraculous weekend in 1986, Craig Pelling returned to a future he could never have envisaged. Even by his own hapless standards, his plans have spectacularly backfired. Does he face a bleak, lonely future, or does he try to seek answers? Either way, an emotional roller coaster beckons.

In one terrible moment, paramedic Sophie Phillips' life is ripped apart - her police officer husband is shot on their doorstep and their ten-month-old son is abducted from his bed. Suspicion surrounds her possibly corrupt husband, but Sophie believes the attack is much more personal. Sophie enlists her husband's partner in the hunt for her son, but will the history they share prove harmful to Sophie's ability to complete her mission?

When Bonnie Graham arrives at her boyfriend’s apartment in London, she is horrified to discover a dead body in a pool of blood on the floor. But she doesn’t call the police. Bonnie hides the corpse and then carefully wipes away any evidence she was ever there. Bonnie is a music teacher who spent a long, hot summer in London rehearsing with a band to play at a friend’s wedding. It was supposed to be fun, but the band members find the complicated knots of their friendships - some old, some new - unraveling as the days themselves unwind.

Claudia Morgan-Brown finally has it all. Pregnant with a much-wanted first baby of her own, she has a happily established family of two small step-sons and a loving husband with a great career. But she is also committed to her full-time job as a social worker, and her husband travels often. So when Claudia hires Zoe to help her around the house in anticipation of the baby’s arrival, it seems like the answer to her prayers.

Dr Cat Lupo aches for another child despite the psychosis which marked her first pregnancy. So when Ruby Winter, a small girl in need of help, arrives in the middle of the night, it seems like fate. But as the events behind Ruby's arrival emerge - her mother's death, her connection to Cat - Cat questions whether her decision to help Ruby has put her own daughter at risk.