Symptoms

A reclusive translator who has recently returned to England after living abroad. She becomes increasingly unsettled in the manor, experiencing disturbing noises and visions, and exhibits obsessive impulses that culminate in violence.

A writer and Helen's friend who stays at the estate for the weekend. Practical but drawn into Helen's emotional turmoil, she becomes entangled in the house's tension and eventually becomes a casualty of its violence.

The handyman living in the stables who harbors a troubling fixation on Helen and Cora. He represents a looming local threat and becomes a focal point of suspicion before meeting his end.

Helen's ex-boyfriend who returns during the visit and rekindles tension with Anne. His appearance foreshadows peril and culminates in a violent confrontation.

A mysterious figure linked to Brady; her presence haunts the house through photographs and rumors. Her body is later found decomposed in the lake, underscoring the weekend's fatal secrets.

The housekeeper who tends to the estate and later provides crucial context about the inhabitants. She witnesses key events and becomes part of the investigation into the deaths.

A chemist who runs the town's shop and shows concern about Cora's absence. He serves as a local informant, occasionally connecting the threads of the mystery.

Burke's protege who arrives at the estate with the others. He participates in the group's investigation and represents the more rational, inquisitive side of the visitors.