In a peaceful retirement village, four unlikely friends meet weekly in the Jigsaw Room to discuss unsolved crimes; together, they call themselves the Thursday Murder Club. When a local developer is found dead with a mysterious photograph left next to the body, the Thursday Murder Club suddenly find themselves in the middle of their first live case.

Detective Sergeant Chris Waters got the call at 05.29 that July morning. This is it, said DCI Reeve, you'll be first there, it's all yours, you're the crime scene manager. Suddenly, after months of waiting and wondering, Waters finds himself in at the deep end, and alone at the scene of a puzzling murder. As the investigation proceeds, the detectives at Kings Lake Central find themselves visiting familiar places and talking to some familiar faces, while old enmities reappear in the incident room. Before this is over, Chris Waters will need to make a career-changing decision.

It’s the worst possible time for Detective Kerri Devlin to be involved in an all-consuming double-homicide case. She’s locked in a bitter struggle with her ex-husband and teenage daughter, and her reckless new partner is anything but trustworthy. Still, she has a job to do: There’s a killer at large, and a pregnant woman has gone missing. Once Devlin and her partner get to work, they quickly unearth secrets involving Birmingham’s most esteemed citizens. Each new layer of the investigation brings Devlin closer to the killer and the missing woman.

One year ago, Lucy’s sister, Nicki, left to meet friends at a pub in Dublin and never came home. The third Irish woman to vanish inexplicably in as many years, the agony of not knowing what happened that night has turned Lucy’s life into a waking nightmare. So, she’s going to take matters into her own hands. Angela works as a paper-pusher in the Missing Persons Unit, but wants nothing more than to be a fully fledged member of An Garda Síochána, the Irish police force. With the investigation into the missing women stalled, she begins pulling on a thread that could break the case wide open.

When talented journalist Penelope “Casey" Harrison starts to research a piece about the #MeToo movement that includes an incident in her own life that she has been trying to put out of her mind for years, she does not realize the young man who drugged and assaulted her at a fraternity house party in college is now a wealthy, powerful industrialist on the eve of a merger that will make him a billionaire - and who will do anything, even murder, to cover his tracks.

Research scientist Caitlyn Lindsey is convinced that someone is taking out her team one by one. First, a friend and research partner was killed in a home invasion. Three months ago, her boss died in a suspicious car accident. Four days ago, another partner supposedly committed suicide. And now Caitlyn herself has miraculously survived a hit-and-run. Afraid for her life with nowhere to turn, she reaches out to one of the victim's husbands, Detective Josh Solomon.

Cherringham - a quiet town in the Cotswolds. Nothing ever happens there, or so it seems - until one morning a woman's body is found in the river. A terrible accident, according to the police. But is this true? Sarah believes there must be more to it. In Jack, a former NYPD homicide detective, she finds a partner who is willing to start investigating with her. They soon find out that things are not as clear as the police want them to be ... This first - of many cases brings Sarah and Jack together in an unlikely partnership.

Ariel Price wakes up in Lisbon, alone. Her husband is gone—no warning, no note, not answering his phone. Something is wrong. She starts with hotel security, then the police, then the American embassy, at each confronting questions she can’t fully answer: What exactly is John doing in Lisbon? Why would he drag her along on his business trip? Who would want to harm him? And why does Ariel know so little about her new—much younger—husband?

Natalie Long is missing. About to board a high-speed train from London’s Paddington station, she has vanished without a trace. For Detective Chief Inspector Paul Cullen of the British Transport Police, the case is personal. Natalie is good friends with his daughter, Amy, who is certain Natalie is in great danger. Something terrible did happen that weekend. And the time for answers is running out. But can DCI Cullen uncover the truth before it is too late?

When crime reporter Jordan Manning leaves her hometown in Texas to take a job at a television station in Chicago, she’s one step closer to her dream: a coveted anchor chair on a national network. Jordan is smart and aggressive, with unabashed star-power, and often the only woman of color in the newsroom. Her signature? Arriving first on the scene—in impractical designer stilettos. Armed with a master’s degree in forensic science and impeccable instincts, Jordan has been able to balance her dueling motivations: breaking every big story—and giving a voice to the voiceless.

On a sunny morning in late September, Shannon Blaine sets off for a jog along the rural roads near her home in Lake George, New York. It’s her usual a.m. routine, her “me time” after dropping the kids off at school...except on this day, she never returns. Is her husband lying when he says he has no clue where she is? Could Shannon have split on her own, overwhelmed by the pressures of her life? Or is she the victim of a sexual predator who had been prowling the area and snatched her before she knew what was happening?

Quint Adler is a small town crime reporter with bigger aspirations. Stuck in a hospital bed on his 40th birthday, he overhears a conversation that arouses his suspicions. Sensing an opportunity, Quint starts his own investigation, bypassing local law enforcement in the process. His inquiries lead him to the scene of a savage murder. And then a second one, even more barbaric in nature.

Ferrying tourists around Dublin for the Leprechaun Limo Service makes quite a change after years in the military. Still, Megan Malone is enjoying her life in Ireland. She likes the scenery, the easy pace, the quirky, quick-witted locals. Everything - except having one of her clients drop dead at the statue of fabled fishmonger, Molly Malone. Most restaurant critics notch up their share of enemies. Elizabeth Darr, however, was a well-loved international star. She and her husband, Simon, had just had dinner when Elizabeth collapsed, and spoiled seafood is the first suspect.

Urban artist Riley Flynn spends her days wandering the streets of Dallas, sketching the city she loves. Then dead bodies start showing up in the exact locations she was sketching, and the police arrive on her doorstep. With every reason in the world to distrust the law, she’s reluctant to help the striking detective assigned to the case, especially after the cops start treating her like a suspect.

Most people flee to Hawaii for gorgeous weather, white-sand beaches, and cocktails at sunset. Charlotte Gibson, however, is fleeing for her life after a vengeful mobster leaves a severed finger on her doorstep as a warning. Message very much received.