| A | B |
|---|
| Hercule Poirot | Retired Belgian police officer. Agatha Christie's most famous detective. |
| M. Bouc | The director of the Compagnie Wagon Lits. |
| Dr. Constantine | The coroner aboard the Orient Express. |
| Mary Debenham | Daisy Amrstrong's governess. |
| Mrs. Hubbard | Really Linda Ardern, famous actress and grandmother of Daisy Armstrong. |
| Colonel Arbuthnot | A friend of Colonel Armstrong. |
| Princess Dragonmiroff | A Russian princess. |
| Hector McQueen | Ratchett's personal secrectary. |
| Ratchett | Real name Cassetti. The victim on the train. |
| Countess Andrenyi | The sister of Sophie Armstrong. |
| Count Andrenyi | Takes his wife's place in the Murder. |
| Cyrus Hardman | The big flamboyant American. |
| Antonio Foscanelli | A big menacing Italian man. |
| Greta Ohlsson | The Swedish lady who was Daisy Armstrong's nurse. |
| Hildegarde Schmidt | The Armstrong's cook. |
| Edward Henry Masterman | Ratchett's valet. |
| Pierre Michel | Father of the suicidal nursemaid of Daisy Armstrong. |
