Dr. Carl Horker

Patricia Lane

Dr. Horker is a manipulative psychiatrist who obsessively controls and studies Patricia, blurring the line between doctor and captor.

Nicholas Devine

Dr. Horker is Nicholas's psychiatrist, but his methods are unethical and he views Nicholas as a case rather than a patient.

The Other

Horker sees The Other as a dangerous adversary to be studied and controlled, leading to a tense power struggle.

Honey

Horker interacts with Honey primarily as a source of information about Patricia and Nicholas.

Mueller

Mueller is Horker's assistant or colleague, aiding in his questionable psychiatric experiments.

The Doctor

Horker and The Doctor are colleagues who discuss Patricia's case, though Horker dominates the conversation.

Dear Nick

Dear Nick distrusts Horker and sees him as a threat to Patricia and to Nicholas's recovery.

Patricia Lane

Dr. Horker is a manipulative psychiatrist who obsessively controls and studies Patricia, blurring the line between doctor and captor.

Patricia Lane

Dr. Horker is a manipulative psychiatrist who obsessively controls and studies Patricia, blurring the line between doctor and captor.

Honey

Horker interacts with Honey primarily as a source of information about Patricia and Nicholas.

The Other

Horker sees The Other as a dangerous adversary to be studied and controlled, leading to a tense power struggle.

Nicholas Devine

Dr. Horker is Nicholas's psychiatrist, but his methods are unethical and he views Nicholas as a case rather than a patient.

II: Science of Mind

Acts as a father figure to Pat, discusses psychiatry as a science, and expresses concern about Nick's background.

III: Psychiatrics of Genius

Interviews Nick with professional curiosity; offers a preliminary psychological assessment; shows a protective, paternal attitude toward Pat.

A Fantasy of Fear

Horker is mentioned in Pat's thoughts and is visited by Pat at the end of the chapter.

VI: A Question of Science

Answers Pat's questions about Nick's father and psychiatric conditions, warns her to be cautious, and watches her safely home.

VII: The Red Eyes Return

Dr. Horker is mentioned as a trusted figure by Pat and her mother; Pat waves at his window as they drive off, aware of his surveillance.

X: Rescue from Abaddon

Horker arrives to rescue Pat, punches Nick, and carries her to a car. He declines to turn Nick in due to publicity concerns.

XI: Wreckage

Tends to Pat's injuries, explains he followed them with Mueller, diagnoses Nick as a sadist, and extracts a promise from Pat to avoid Nick.

XII: Letter from Lucifer

Referenced in Pat's internal debate; she questions his psychiatric explanations and his disbelief in the soul, while also acknowledging his help in covering up the incident.

XIII: Indecision

Dr. Horker arrives at Pat's house, forbids her from going out, and stays to watch over her until her mother returns.

XIV: Bizarre Explanation

Mentioned as being in his library; Pat avoids his watchful eyes.

XV: A Modern Mr. Hyde

Mentioned in Pat's thoughts regarding his diagnosis of Nick; Mueller is identified as his companion.

XVI: Possessed

Dr. Horker discusses Pat's meeting with Nick, defends his use of Mueller, and listens to Pat's belief that Nick is possessed.

XVII: Witch-Doctor

Horker comforts Pat and offers to investigate Nick's condition, suggesting it may be a psychological fixation rather than a supernatural entity.

XVIII: Vanished

Calms Pat, suggests writing a letter, discusses the Jekyll-and-Hyde concept and the limits of psychiatry.

XIX: Man or Monster?

Mentioned as Pat's confidant; she visits his residence and reflects on his kindness and willingness to help.

XX: The Assignation

Referenced by the other as 'your friend the Doctor' when Pat asks what he is.

XXI: A Question of Synapses

Dr. Horker listens to Pat's account, explains the physiological concept of synapses, and advises her to stay away from Nick. He shows concern for her well-being.

XXII: Doctor and Devil

Interviews Nick, attempts to provoke the other personality, and proposes psychoanalysis, suspecting a defense mechanism from childhood.

XXIII: Werewolf

Dr. Horker is referenced as Pat's source of security and the psychoanalyst who will treat Nick, though Pat's faith in his science wavers.

XXIV: The Dark Other

Returns from golf, conducts the first therapy session, and explains his theory that Nick invented the Other as a childhood defense mechanism.

XXV: The Demon Lover

Pat attempts to call for his help; his house is nearby and a light appears in his window.

XXIX: Scopolamine for Satan

Horker arrives angrily to rescue Pat, but relents and agrees to use scopolamine to probe Nick's subconscious. He prepares the injection and initiates the procedure.

XXX: The Demon Free

Paralyzed by the Other's hypnotic gaze, he is bound to a chair but manages to break the spell with a loud bellow, enabling Pat to act.

XXXI: “Not Humanly Possible”

Tends to Nick's wound, arranges ambulance, and prepares to perform a trephination. He admits the attack's influence is inexplicable and 'not humanly possible,' but rejects Pat's demon theory in favor of a rational explanation.

XXXII: Revelation

Horker performs the surgery, explains the parasitic second brain, and comforts Pat while expressing his own uncertainty about the phenomenon.