The Mystery of the Blue Train · Character
M. Caux
A police officer assisting in the investigation in France.
minor
First appearance: XI: Murder
M. Caux shows up with force in XI: Murder. The page is where that presence becomes real.
Commissary of Police; conducts the initial investigation and discusses theories with Poirot.
M. Caux first appears in 0012 xi murder.
In XI: Murder: Commissary of Police; conducts the initial investigation and discusses theories with Poirot.
Later, in The Comte de la Roche: The Commissary who agrees with the theory and discusses the Comte's criminal history.
Free preview opens at this moment — character cards, Character Web, and themes sit beside the text as you read.
Character Web
12 connectionsA slice of how M. Caux sits in the book — open the reader for the full interactive map.
Relationship types
- Other
Character groups
- Supporting cast and background
- Key suspects and witnesses
- Protagonist
+7 more in the full Character Web
Open in readerNarrative arc
Story tension across the book — this chapter sits in Exposition.
- Setup
- Escalation
- Breaking point
- Aftermath
- Closing
In this scene, the emotional and psychological peak occurs when Poirot’s tone shifts to an uncharacteristic se…
Full beat labels and climax notes unlock in the reader.
Follow the arc while readingIn the story
M. Caux appears across 3 companion beats. Open any chapter in the free preview to see the notes beside the text.
Chapter companion notes
Spoil-light check-ins for M. Caux unlock in the free preview.
See M. Caux in XI: Murder