1 | Jane | Grey | A hairdresser. One of the airplane passengers. |
| Cicely | Horbury | The countess. Aka: Cicely Bland, Lady Horbury. |
| Madeleine | | Lady Horbury's maid. |
| Normal | Gale | A dentist. One of the airplane passengers. |
| Venetia Anne | Kerr | Stephen's childhood friend. One of the airplane passengers. |
| Hercule | Poirot | The famous Belgian detective. Protagonist. |
| Roger James | Bryant | A doctor. One of the airplane passengers. |
| Jean | Dupont | Armand's son. One of the airplane passengers. |
| Armand | Dupont | Jean's father. An archaeologist. |
| Mr. | Clancy | The writer of detective stories. One of the airplane passengers. |
| James Bell | Ryder | Mr. Clancy's seatmate.
Managing director cement company. |
| Madame | Giselle | The victim. A well-known moneylender. |
2 | Henry C. | Mitchell | The senior steward. |
| Albert | Davis | The junior steward. |
3 | Inspector | Japp | Poirot's colleague. A police inspector. |
| Earl | Horbury | Cicely's husband. |
4 | Maitre A. | Thibault | Madame Giselle's lawyer. |
| Henry | Winterspoon | The chief government analyst. |
| Mr. | Wilson | The detective sergeant. |
6 | Mr. | Fourmier | A detective in Surete. |
| Mr. | Giraud | Fourmier and Poirot's common friend. |
| Elise | Grandier | Madame Giselle's maid. |
8 | George | Ebermann | James's partner. |
| L. Marinner | | The person that Jean was supposed to meet. |
9 | Georges | | The man that Madame Giselle helped. |
11 | Mr. | Gilles | The chief of detective force in Surete. |
| Jules | Perrot | The man who worked at the airlines. |
| Silas | Harper | The mystery man who wants to lend money to Madame Giselle. |
12 | Andrew | Leech | The owner of Antoine's. |
| Gladys | | Jane's friend. |
| Jeanne | | The woman at the hairdresser's salon. |
14 | Mr. | Blunt | The colonel. |
| Miss | Ross | Gale's acquaintance. |
| Mrs. | Lorrie | Gale's
acquaintance. |
17 | Dorset | Mitchell | Henry's wife. |
| John | Robinson | The man who blackmailed Cicely. |
| Raymond | Barraclough | Cicely's lover. |
23 | Mere | Angelique | The head of Institute De Marie. |
| Anne | Morisot | Madame Giselle's alleged daughter. Aka: Anne Richards. |
| George | Leman | Giselle's husband. |
26 | John | Gale | Norman's uncle. |