Dr. Cook’s Garden

Dr. Cook believes he is performing mercy killings on patients he deems "unworthy", those he considers to have lived cruel or harmful lives. He views this as a form of community service, removing people he believes contribute evil to Greenfield. This philosophy is reinforced by his observation that the town seems blessed with long lives for kind people and quick deaths for mean ones.

Earlier, the constable explains that the Lord has blessed Greenfield with long life for the kind and quick demise for the unworthy, hinting at Cook's twisted rationale.

The "R" mark in Cook's files stands for "removal", it identifies patients Cook has targeted for euthanasia. The same letter is carved in his garden, signaling which plants (and by extension, which patients) he plans to eliminate. This code is how Tennyson first pieces together the pattern of suspicious deaths.

Tennyson notices the letter R appearing both in medical files and carved into the garden, connecting the two as part of Cook's system.

Tennyson is torn between his loyalty to Cook as a father figure and his duty as a physician. Cook mentored him during a difficult childhood and represented the good father Tennyson never had. Rather than destroy the elderly doctor's legacy and scandalize the town, Tennyson proposes that Cook simply retire from practice, believing this compromises the situation without causing further harm.

Cook's role as a mentor to Tennyson, who had an abusive father, creates the emotional foundation for this difficult loyalty.

After Tennyson discovers the truth and confronts him, Cook realizes his secret is exposed. Rather than accept retirement and risk Tennyson changing his mind, Cook decides to eliminate his former protege. The poisoning attempt represents Cook's determination to protect his method and legacy, showing he will kill anyone who threatens to expose him, even someone he once mentored.

The fragile pact between Tennyson and Cook is short-lived, as Cook's need to control and protect his system overrides his bond with Tennyson.

When Cook suffers a heart attack during their struggle, Tennyson deliberately withholds the medication that could save him. This is Tennyson's final act of mercy, but it also mirrors Cook's own logic of deciding who deserves to live or die. By refusing to help, Tennyson becomes complicit in the same moral reasoning he condemned, leaving him morally compromised despite surviving.

This ending echoes Cook's own euthanasia philosophy, completing the dark irony of their relationship.

The constable tells Tennyson that God has blessed Greenfield with long life for kind people and quick death for the unworthy. This local belief provides the cultural context that allowed Cook's murders to go unnoticed, it frames suspicious deaths as divine justice rather than murder. The constable's worldview essentially gives Cook cover for his actions.

This explanation comes early in Tenny's investigation, planting the seed that the town has normalized the deaths.

Cook reveals that he murdered his own abusive father, whom he describes as a cruel man. He frames this as his first act of "mercy killing," justifying it as removing evil from the world. This backstory explains how Cook developed his philosophy, he has spent decades believing he has the right to judge who deserves to live or die based on their moral character.

Cook's justification of killing his father sets the precedent for his entire practice of euthanasia.

Tennyson notices a pattern of sudden patient deaths, then finds a cabinet full of poisons in Cook's clinic that shouldn't be there. Further investigation reveals the "R" code in Cook's files, which matches a symbol carved in the garden. These concrete pieces of evidence combine with the constable's ominous explanation to confirm his suspicions.

The string of deaths and the poison discovery are the first concrete clues that something is wrong in Cook's practice.

The garden represents Cook's philosophy of control and selective killing. He uses it as a metaphor for tending his community, removing the "weeds" (morally unworthy people) to maintain beauty and order. The "R" marks in the garden correspond to patients he plans to eliminate, making it both a literal and symbolic record of his murders.

The garden is introduced early as a peaceful hobby, but its darker meaning emerges as Tennyson investigates.

The ending leaves Tennyson morally compromised. While he survives and removes the immediate threat, his deliberate refusal to save Cook makes him complicit in the very act he condemned. He has avenged the victims intellectually but becomeEXECUTES the same judgment. The town now faces questions about Cook's true legacy, and Tennyson must live with having mirrored his mentor's ethics.

This moral stain mirrors Tennyson's internal conflict throughout the film, he struggles between loyalty to Cook and his oath to do no harm.