Readers and viewers often highlight the "transitional" nature of this first case, where Poirot is still refining his legendary persona.
To see how the 1990 film adaptation compares to the original debut novel, you can watch this breakdown of the key changes and highlights: Poirot - The Mysteri...
The film version starring David Suchet is noted for its extreme fidelity to the source material while making specific thematic choices. Poirot - The Mysteri...