The chaotic but happy equilibrium of the Nightingale family is thrown into disarray when Cecily - whose children can't remember her ever being remotely spontaneous - disappears to a Greek island with no warning or explanation. Her reasons for doing something so out of character are a total mystery to her three daughters, high-powered executive Felicity, unfulfilled GP Julia and organised mother-of-five Lily.

Kate Bennett vanished from a parking lot eleven years ago, leaving behind her husband and young daughter. When she shows up at a Montana gas station, clutching an infant and screaming for help, investigators believe she may have been abducted by a cult. Kate’s return flips her family’s world upside down - her husband is remarried, and her daughter barely remembers her. Kate herself doesn’t look or act like she did before.

Loch Ewe, 1940. When gamekeeper's daughter Flora's remote highland village finds itself the base for the Royal Navy's Arctic convoys, life in her close-knit community changes forever. In defiance of his disapproving father, the laird's son falls in love with Flora, and as tensions build in their disrupted home, any chance of their happiness seems doomed.

Penny and Victoria are about as different as two siblings can be, one with a smart London lifestyle, the other struggling to make ends meet. But they are joined by more than blood, and their shared tragic past is affecting the present more than they realise. When events begin to tug at the fabric beneath which dark secrets are hidden, the resulting chaos threatens to tear the two families apart. Could there be aspects of the past that youngest child Penny doesn't remember? Could the truth of Marge be more complex than the beloved mother the girls choose to perceive?

In the midst of the Second World War, Eva receives the devastating news that her husband is missing and presumed dead. Neither wife nor widow, she lives in a numb state of limbo until, in the heat of an English summer, she meets Bill, a black American GI. Despite their vastly different backgrounds, neither can deny the love that overcomes them in the frantic weeks that follow, when every day could be their last.

After the loss of her mother and her own battle with breast cancer, Joanna Teale returns to her graduate research on nesting birds in rural Illinois, determined to prove that her recent hardships have not broken her. She throws herself into her work from dusk to dawn, until her solitary routine is disrupted by the appearance of a mysterious child who shows up at her cabin barefoot and covered in bruises. The girl calls herself Ursa, and she claims to have been sent from the stars to witness five miracles.

Josie Bianci was killed years ago on a train during a terrorist attack. Gone forever. It’s what her sister, Kit, an ER doctor in Santa Cruz, has always believed. Yet all it takes is a few heart-wrenching seconds to upend Kit’s world. Live coverage of a club fire in Auckland has captured the image of a woman stumbling through the smoke and debris. Her resemblance to Josie is unbelievable. And unmistakable. With it comes a flood of emotions - grief, loss, and anger - that Kit finally has a chance to put to rest: by finding the sister who’s been living a lie.

Barbara - a child of the Blitz - has more secrets than she cares to admit. She has protected her children from the harsh realities of life and told them little of the poverty of her childhood, nor of the darker side of her marriage to one of Britain's most famous photographers. With such an incomplete picture, her youngest, Sophie, has struggled to understand who her parents really are, and in turn, Barbara sometimes worries, to build her own identity.

Fifteen years ago in the colourful bustle of Vietnam, Celine and Patrick met and shared four blissful days together. It felt like true love, but soon reality tore them apart and Celine moved on. But now, when she sees him unexpectedly on a busy London street, suddenly nothing else matters. As she deals with the mixed emotions of an amicable divorce, Celine becomes preoccupied with her daughter and the dating agency she founded - not least when her ex-husband, Mike, asks her to find him someone new.

When Catherine learns that she is dying, she remembers the words her husband once jokingly uttered and decides to leave him the ultimate posthumous gift: a time capsule containing photographs of their life together along with tape recordings in which she recounts every secret she ever kept, every unspoken thought whether loving or treacherous - the things they never said.

It’s a beautiful day for a wedding. White roses scent the air and the summer sunlight streams in. A spoon chimes against a champagne flute and the room falls silent. And there he is - my husband - getting to his feet to propose a toast. He’s still handsome. His new wife is next to him, gazing upwards, oblivious. I’m not supposed to be here. All these years in the same town and I had no idea until I saw his name on the seating plan. He lived with me, once. Loved me. Small-town memories are long, but the people in this room don’t want to remember.

The four Bliss siblings have a loving but complicated bond, but when their mother, Dorothy, dies seemingly without a will, this relationship is put to the test. As the mourning siblings try to make sense of the situation, one of them is caught with a secret: before she died, Dorothy entrusted her favourite daughter with her will and a letter - and told her to destroy them both. But what Anna finds in the documents could change everything. Do the other siblings not deserve to know what it is about them that their mother was so desperate to hide?

Struggling to balance her personal and professional life, young DS Becca Vincent has landed the biggest case of her career - and she knows that it will make or break her. But she can’t catch the culprit alone. Together with facial recognition expert Joe Russell, she strives to get a lead on the elusive murderer, who is always one step ahead of them. Time is not on their side. The body count is rising, and the attacks are striking closer and closer to home. Can Becca and Joe uncover the connection between the murders before the killer strikes the last name from his list?

Christopher and Hannah are a happily married surgeon and nurse with picture-perfect lives. All that’s missing is a child. When Janie, an abandoned six-year-old, turns up at their hospital, Christopher forms an instant connection with her, and he convinces Hannah they should take her home as their own.

Gemma Robinson comes into Elliot’s life like a whirlwind, and they marry and settle into his home. When she asks him if her parents can come to stay for a couple of weeks, he is keen to oblige - he just doesn’t quite know what he’s signing up for. The Robinsons arrive with Gemma’s sister, Chloe, a mysterious young woman who refuses to speak or leave her room.