Judith is a 77-year-old crossword puzzle creator living alone in a decaying mansion in Marlow. She values her independence and relies on sharp logical deduction to process the world. When she hears a gunshot from her neighbor's property, her frustration with the official police response prompts her to investigate the matter herself.

Suzie is a pragmatic dog walker who resides in an unfinished building site after a contractor scammed her. She possesses a blunt demeanor and maintains a vast network of local contacts through her daily walks around town. Her loyalty to a kind client draws her directly into the amateur investigation.

Becks is the anxious wife of the local vicar, constantly feeling constrained by the expectations of her domestic role. She maintains an immaculately clean home but harbors a strong desire for agency outside her marriage. She uses her extensive knowledge of the local property market to assist the investigation.

Elliot is the cultured owner of the Marlow Auction House. He maintains an aristocratic demeanor but harbors long-standing professional resentments. He frequently clashes with other local figures over art valuations and business dealings, quickly becoming Judith's primary suspect.

DS Malik is an acting Senior Investigating Officer struggling with an underfunded department. She relies strictly on police procedure and tangible evidence, making her highly skeptical of amateur theories. She attempts to balance her demanding career with a strained family life at home.

Danny coaches a youth rowing squad and runs the local water sports facility alongside his wife. He deals with constant financial strain due to severe winter floods damaging the property. He resents his perceived lack of success compared to his wife's athletic achievements.

Andy is a well-dressed solicitor working in town. He handles local wills and estates, projecting a polished image of professional respectability. He often speaks condescendingly to older women and exhibits predatory behavior during meetings.

Stefan is an art dealer who resides in an idyllic riverside home. He presents a charming public persona while running his local gallery. His recent public arguments with an auctioneer raise immediate questions about his business practices.

Iqbal is a diligent and private taxi driver known for his extreme kindness. He saves his earnings with hopes of eventually purchasing a boat. He regularly donates a portion of his income to charity and steps up to look after his late neighbor's dog.

Liz is a former Olympic silver medalist in solo rowing with striking auburn hair. She co-owns the local rowing center but maintains a highly private demeanor. She frequently avoids questions about her connections to town residents.

Antonia works as an assistant at Stefan's art gallery. She remembers Judith fondly from a past encounter where Judith protected her from harassment. She provides crucial early information about Stefan's visitors.

Daisy is Elliot's wife, presenting a friendly Irish charm that masks a fiercely protective nature. She stands by her husband unconditionally and aggressively shields him from outside accusations.

Colin is the local vicar of All Saints Church. He relies heavily on his wife to maintain their domestic life and public image, largely oblivious to her internal frustrations.

Fred is the neighborhood postman and a former chairman of the auction house. He enjoys gossiping about town residents and possesses deep knowledge of local business histories.

Imam Latif leads the local mosque in High Wycombe. He pays close attention to his congregants' lives and provides important details about their personal struggles.

Philippos is Judith's late Greek husband. He was a handsome but controlling sailor whose unfaithfulness caused deep rifts in their marriage before his death in a boating accident.

Ezra is a late resident whose large estate and sudden will changes cause friction in the neighborhood. He owned a beloved Doberman before passing away.

Emma is a loyal Doberman who originally belonged to Ezra before being taken in by Iqbal. She is highly protective of those who care for her.

Sam is Becks's teenage son. He remains largely absorbed in his own teenage world, completely unaware of his mother's secret investigative activities.

Chloe is Becks's teenage daughter. She recently clashed with her mother after sneaking out with alcohol, reflecting a rebellious streak.

Shamil is DS Malik's husband. He aspires to be a DJ and frequently expresses frustration over his wife's demanding police schedule interfering with their home life.

Shanti is DS Malik's young daughter. She misses her mother's presence at bedtime due to the intense demands of the ongoing murder investigations.

Amy is Suzie's adult daughter. The two have experienced a falling out and have not spoken in over a year, leaving Suzie feeling isolated.

Dudley is Elliot's late father. He previously ran the auction house and strictly forbade his son from pursuing a career in fine art.

Crumble is a Welsh springer spaniel that Liz inherited from her father. The dog's sudden disappearance causes local gossip about Liz's character.