Don’t Open the Door

The film's protagonist who returns to Allerton after thirteen years upon her grandmother's illness. She navigates a web of threats, deception, and fear as she confronts the mystery surrounding her mother's murder and the ownership of the family home. Her judgment is challenged by a claustrophobic environment and a growing sense of paranoia, leading toward a fraught confrontation with the truth.

Amanda's mother, murdered in 1962 by an unseen assailant. Though she appears only as a memory and a recurring presence in the house, her death continues to haunt Amanda as a driving force behind her fear and pursuit of the truth.

Amanda's grandmother, a frail figure whose impending death becomes the catalyst for revisiting family secrets. Harriet's home becomes a focal point for the clashes among those who want to control the estate, hinting at long-buried secrets.

The family physician who administers medication to Harriet, raising questions about consent and sedation. His involvement ties him to the conspiracy surrounding the grandmother's care and the plan to claim the property.

A persistent figure who offers to pay for the grandmother's home, representing the mercantile pressure on the inheritance. His intentions seem aligned with Claude's, and he becomes entangled in the web of threats against Amanda.

The museum owner who is orchestrating the scheme to seize Harriet's home. He disguises himself as a mannequin to threaten Amanda and commits violent acts, including killing Crawther, revealing his perverse and predatory nature.

Amanda's doctor friend who visits Harriet to check her condition and suspects sedation. He becomes part of the danger when he is confronted in the house and ultimately dies in pursuit of Amanda's safety.

A local woman who made the anonymous threatening calls that draw Amanda back to Allerton, linking the present danger to a town whose secrets are not easily kept.