Joyce is a retired nurse in her late seventies living in the Coopers Chase retirement community with her dog, Alan. She serves as the club's diarist, recording their investigations and her personal observations. While others often underestimate her bubbly demeanor, she possesses a sharp intellect and a maternal instinct that she uses to gently manipulate suspects and support her friends.

Elizabeth is a retired MI5 spy in her late seventies who acts as the unofficial leader of the Thursday Murder Club. She utilizes her extensive knowledge of espionage and her remaining professional contacts to bypass police procedures and gather information. She is currently facing severe emotional strain as she acts as the primary caregiver for her husband as his cognitive health declines.

Ibrahim is an eighty-year-old retired psychiatrist originally from Egypt. He functions as the intellectual core of the investigative group, often analyzing suspect behavior and creating organized timelines. He carries a private, decades-old grief regarding a tragic loss from his youth in London, a memory he keeps hidden from his closest friends.

Ron is a gruff, working-class former trade union leader and devoted West Ham fan. He brings a confrontational energy to the club's investigations, often serving as their muscle or distraction. He is a stubborn idealist who distrusts police authority but remains fiercely loyal to his inner circle and his family.

Bogdan is a Polish builder and reliable handyman who does frequent work around the Coopers Chase community. Considered the unofficial fifth member of the club, he handles the physical and occasionally extralegal tasks the retirees cannot manage themselves. He provides quiet, steadfast emotional support to those he cares about.

Donna is a local Police Constable who frequently works alongside the Thursday Murder Club. She is ambitious in her career but increasingly willing to ignore bureaucratic orders and protocol to help her elderly friends investigate local crimes.

Chris is a Detective Chief Inspector (DCI) who collaborates with the club. He is deeply in love with his girlfriend and occasionally frustrated by the political maneuvering within his police department. He becomes increasingly willing to use unorthodox, independent methods to solve cases when official avenues are blocked.

Stephen is Elizabeth's beloved third husband. He is currently struggling with rapidly advancing dementia, finding his present surroundings increasingly confusing. Despite his illness, he retains a sharp appreciation for history and archaeology, and he strives to maintain his dignity as his memory slips.

Kuldesh is an elderly widower and antiques dealer whose sudden murder sets off the primary investigation of the novel. He is knowledgeable about historical artifacts and lives a quiet life until a dangerous item is dropped at his shop.

Jill is a Senior Investigating Officer (SIO) from the National Crime Agency. She is highly focused on recovering a missing shipment that slipped through her unit's surveillance, making her abrasive and dismissive of local police work.

Mitch is a powerful heroin importer operating on the South Coast. He is under immense pressure from his overseas suppliers to locate a missing shipment, leading him to employ violent tactics to recover his goods.

Dominic is a trusted assistant within a local drug smuggling operation. He uses a warehouse as a front for illegal activities and is directly involved in depositing a dangerous item at a local antiques shop.

Luca is an aggressive street-level distributor and business partner in a local drug operation. He is highly suspicious of those around him and uses physical intimidation to maintain control of his territory.

Connie is the leading cocaine dealer on the South Coast, currently managing her operations while incarcerated. She serves as a valuable source of information regarding the local criminal underworld and uses her psychiatric sessions to negotiate intelligence.

Mervyn is a handsome but somewhat gullible retiree living in Coopers Chase. He is engaged in an online relationship with a woman in Lithuania to whom he sends money, drawing the concern of his neighbors who suspect a scam.

Bob is the resident technology expert at the retirement community. Quiet and unassuming, he is pulled into the club's orbit to help trace online scams and project digital evidence, finding unexpected companionship in the process.

Samantha is an unscrupulous antiques dealer who is widely known to deal in, and personally create, art forgeries. She operates on the fringes of the legitimate art world and is constantly seeking new, illicit opportunities for profit.

Garth is Samantha's imposing, no-nonsense Canadian partner. He has a history in corporate espionage and large-scale theft, making him highly capable of physical violence and tactical planning.

Nina is a professor of historical archaeology at the University of Kent. She maintains connections to the local antiques trade through her late parents and serves as an academic authority on the provenance of historical items.

Jonjo is a university professor and an expert at identifying historical forgeries. He understands the power of storytelling in the antiques business and appreciates the cultural significance of ancient artifacts.

Snowy is a local feral fox with white-tipped ears that frequently visits the retirement community. He brings small moments of joy to the residents and serves as a comforting anchor for those struggling with memory issues.

Jason is Ron's son, a man who has past connections to the local underworld. He occasionally uses his old contacts to provide his father and the police with street-level information.

Pauline is a makeup artist and Ron's romantic interest. Their relationship has recently hit a rocky patch following a disagreement over Christmas, but she remains an important emotional anchor in his life.

Patrice is Donna's mother and Chris's girlfriend. She is supportive of their police work and actively volunteers to help the investigative group process crime scene evidence.

Viktor is a former Soviet agent who shares a long, complex professional history with Elizabeth from their days in espionage. He operates outside standard legal channels and provides discreet assistance when required.

Joanna is Joyce's adult daughter. She visits her mother during the holidays and remains a consistent, if sometimes distant, part of her life.

Big Dave is a fellow widower who owns the hardware store across the street from Kuldesh's shop. He provides local observations and details about his neighbor's recent purchases.