The Big Four · Character

Mrs. Halliday

The wife of the murdered Halliday.

minor

Also known as Halliday

First appearance: i the unexpected guest

Mrs. Halliday's tie to Hercule Poirot is one of the pressures that moves The Big Four—worth meeting in the text, not only on a cast list.

British scientist who disappeared in Paris; his work on wireless energy is linked to the Big Four.

In the storyV: Disappearance of a ScientistOpen this moment free

See Mrs. Halliday in V: Disappearance of a Scientist Book page

Free preview opens at this moment — character cards, Character Web, and themes sit beside the text as you read.

With Hercule Poirot (professional): Mrs. Halliday is a client or person of interest in the case, interacting with Poirot as part of the investigation. With Madame Olivier (social): Madame Olivier and Mrs. Halliday are likely acquaintances or co-conspirators within the Big Four's network. With Hercule Poirot (professional): Mrs. Halliday is a client or person of interest in the case, interacting with Poirot as part of the investigation.

Continue beside the text

The fuller portrait of Mrs. Halliday sits in Reading Lens — open the free preview to keep reading with notes on the page.

See Mrs. Halliday in i the unexpected guest

Character Web

9 connections

A slice of how Mrs. Halliday sits in the book — open the reader for the full interactive map.

Relationship types

Professional
Social
Other

Character groups

Core Conspirators and Victims
Protagonist

+4 more in the full Character Web

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Narrative arc

Story tension across the book — this chapter sits in Exposition.

Setup
Escalation
Breaking point
Aftermath
Closing

This is the dramatic climax because Hastings is forced to confront the ultimate emotional and psychological pe…

Full beat labels and climax notes unlock in the reader.

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Relationships

Hercule Poirot
professional · ambivalent
Madame Olivier
social · negative
Hercule Poirot
professional · ambivalent
Madame Olivier
social · negative
Hercule Poirot
professional · ambivalent

Hercule Poirot
Mrs. Halliday is a client or person of interest in the case, interacting with Poirot as part of the investigation.
Madame Olivier
Madame Olivier and Mrs. Halliday are likely acquaintances or co-conspirators within the Big Four's network.
Hercule Poirot
Mrs. Halliday is a client or person of interest in the case, interacting with Poirot as part of the investigation.
Madame Olivier
Madame Olivier and Mrs. Halliday are likely acquaintances or co-conspirators within the Big Four's network.
Hercule Poirot
Mrs. Halliday is a client or person of interest in the case, interacting with Poirot as part of the investigation.

Relationship notes

How these ties play out is in the reading companion — open the free preview.

See Mrs. Halliday in i the unexpected guest

In the story

Mrs. Halliday appears across 4 companion beats. Open any chapter in the free preview to see the notes beside the text.

V: Disappearance of a Scientist
British scientist who disappeared in Paris; his work on wireless energy is linked to the Big Four.
V: Disappearance of a Scientist
Halliday's wife, who insists her husband was devoted to his work and did not leave voluntarily.
The Woman on the Stairs
Missing English scientist; later rescued but refuses to speak about the Big Four due to fear.
VII: The Radium Thieves
Recently released, his nerve is broken; he departs for England.

Chapter companion notes

Spoil-light check-ins for Mrs. Halliday unlock in the free preview.

See Mrs. Halliday in i the unexpected guest

See Mrs. Halliday in V: Disappearance of a Scientist