The Man Who Wouldn’t Die

A resourceful private detective hired by Kay to pose as her husband. He navigates a maze of alibis, traps, and gadgets, using wit and nerve to expose the truth. Shayne orchestrates counter-moves that lead the killer to reveal themselves and ensures the case reaches the police with solid proof.

A central figure in the conspiracy who appears as Kay's stepmother but is entangled with Zorah Bey and Haggard. Anna embodies calculated elegance and a readiness to manipulate those around her to maintain control and preserve her status. Her alliance shifts as the plot tightens.

A physician-researcher involved in the blackmail plot who collaborates with Anna. He uses his medical knowledge to enable the scheme, though his loyalties are tested as danger closes in. His death is the catalyst that drives the investigation forward.

Kay's wealthy father who is anxious under Senate scrutiny. He embodies the protective, upper-class mindset that makes him a suspect and a source of pressure within the household. His actions help escalate the tension around the family’s finances.

Wolff's secretary who participates in the scheme and acts as a secondary orchestrator. He keeps the communications and arrangements moving behind the scenes. His involvement reveals the reach of the conspiracy through the household staff.

Kay's husband, who is involved in the broader plot and the potential blackmail. The revelation of his true status adds personal stakes to the mystery and heightens the tension between Kay and her family.

A magician friend who helps with the investigation and understands illusion in a literal and figurative sense. Merlini provides crucial insight into the 'buried alive' act and the thematic link between illusion and crime.

The local police chief who questions the Wolffs and their circle. He represents institutional authority and serves as the counterpoint to Shayne’s unorthodox methods. His car is stolen in the chase sequence, heightening the danger.

The antagonist whose return to the United States triggers the blackmail plot. He pushes for money and becomes entangled in the deadly web after the truth of Anna and Haggard’s deception is revealed. His actions drive the final confrontation.

An observant house worker who witnesses the burial and later becomes entangled in the unraveling of the plot. His presence underscores the mansion’s secrets and the consequences of keeping silent.

A minor servant who contributes to the atmosphere of the mansion. The Maid’s presence adds to the household’s lived-in feel and hints at the wide web of relationships around the Wolffs.

Kay is the daughter who has secretly married Roger Blake and hires Shayne to uncover the truth. Her role as confidante and beneficiary of the detective’s help weaves through the investigation.