A bankrupt nobleman and unhappy husband of Dorothy. He murders his wife, stages it as suicide, and becomes the temporary estate administrator. His growing romantic attachment to Nancy creates internal conflict and jeopardizes Gianna's plans.
A mutual friend of the Capuana couple who is secretly Barbara's lover. His home serves as the setting for the killer's final attack and the story's climax.
Dr. Kurt Lowe is a doctor whom Cynthia turns to when she fears Bernard is harming her. He agrees to have the drink Bernard gave her analyzed and urges her to remain calm. Bernard arrives while Lowe is with Cynthia, bringing the situation to a confrontation that remains unresolved in the available dialogue.
Associate or relative of the Griva crime family.
The lead police investigator on the park murders. He deals with taunting calls from the killer, pursues the switchblade purchase trail, and rushes to prevent Giorgio's final confrontation with Marchi.
Montani is an Interpol officer who offers Tony Arzenta protection in exchange for information. He explains that his men have created a protective network around Tony, but Tony refuses because he will not become an informant. Montani therefore represents a lawful escape route that Tony consciously rejects.
A frequently traveling engineer who returns home to find his wife has killed their neighbor, calmly hides the body under leaves and a car, and listens to Anna's full account.
Valerio Mantovani is a professor whose relationship with Raffaella Macchiavelli becomes the central threat to her marriage with Giovanni Macchiavelli. Raffaella plans to meet him, struggles to give him up, and is shaken when she learns he is leaving for Spain. She later tries to telephone him from the ship.
Dr. Batrucchi is Angela’s father. On returning from a trip, he tells her he has met a remarkable woman and intends to marry her, hoping the marriage will bring him and Angela closer. He also discusses business and property matters, while his announcement intensifies the tension in his relationship with Angela.
Dr. Shuman, also called Franz in the story, is presented as Madeleine's French husband, a doctor interested in psychology and the occult who observes her and tells Thomas she is prone to schizophrenic episodes. The final revelation identifies him as a psychiatrist studying Madeleine; she nevertheless awakens believing he is her husband.
William Perkins is a rough criminal among the murdered inhabitants haunting the castle. His apparent ghost re-enacts the violent history surrounding the castle and helps intensify Alan Foster's fear and confusion. Like the other supernatural figures, William is ultimately revealed not to be a true ghost but a vampire dependent on Foster's blood.
Andrea is Laura's husband, whose lack of affection leaves her feeling as though she barely exists in his eyes. His attention is focused on Delfina, despite Laura's attempts to restore their relationship. While hunting, he accidentally shoots Laura, mistakes her for no immediate concern, and moves toward Delfina without recognizing the fatal outcome.
Silvano Tranquilli has 48 screen credits in a career dating back to 1958. Their work spans 2 cinematic universes — most prominently Inspector Betti Collection with 2 titles. Signature works include Smile Before Death, Odore di spigo, L'ultimo giorno. Explore the interactive character relationship maps on each title page to trace how their roles connect across franchises.
Universe traveler — spans 2 universes
Related entry on Wikidata (Q3960677), public domain (CC0).
