An unofficial leader of the Thursday Murder Club and former spy with MI5, Elizabeth is known for her intelligence and leadership skills, guiding the club through various mysteries.

An 80-year-old retired psychiatrist and member of the Thursday Murder Club from Egypt, he faces personal challenges after an assault but remains a cerebral and dignified presence.

A former trade union leader and member of the Thursday Murder Club, known for his straightforwardness and working-class background, he often contrasts with the more cerebral members of the club.

A police constable and friend to the Thursday Murder Club, she navigates her role within the local police force while forming important alliances with the club members.

A detective chief inspector in Fairhaven police force, he is a friend to the Thursday Murder Club and often collaborates with them outside the bounds of traditional law enforcement.

A Polish builder with a complicated past, Bogdan works closely with the Thursday Murder Club, providing support and displaying loyalty, particularly to Elizabeth and Stephen.

Elizabeth’s third husband, whose battle with dementia affects his day-to-day life, but he continues to exhibit moments of clarity and intellectual prowess.

An active MI5 agent and one of Elizabeth's ex-husbands, characterized by his outdated charm and attitudes that often clash with modern society.

An MI5 agent depicted as an antagonist, her similarities to Elizabeth provide insight into her cunning and strategic mind.

A middleman for international criminals, he plays an antagonistic role due to the theft of valuable diamonds that complicate his dealings.

A mafia member from New York involved in retrieving stolen diamonds, highlighting the novel’s international criminal elements.

Known as Fairhaven’s “queenpin,” she manages a drug operation and becomes entangled in a subplot involving the local police.

A minor criminal whose assault on Ibrahim triggers a personal vendetta by the Thursday Murder Club, showcasing his reckless behavior.

A young MI5 officer new to espionage, her sensitive nature and bond with Joyce are significant episodes during her assignment.

A former Special Boat Service member and MI5 operative with personal struggles, adding complexity to the diamond theft storyline.

A character who deceives others by assuming a false identity, creating intrigue and confusion within the narrative.

Donna’s mother and Chris’s romantic interest, involved in a subplot that highlights personal relationships in the story.

Opens and closes the narrative, providing a connection to themes of loss and dementia, with a personal backstory unfolded later.

Ron’s young grandson whose presence acts as a catalyst in Ibrahim’s journey toward emotional recovery.