| 1 | Lanscombe | | The old butler. |
| | Cornelius | Abernethie | The woman in the portrait. aka: Coralie. |
| | Richard | Abernethie | Lanscombe's master. Never recovered from Mr. Mortimer's death. |
| | Mortimer | Abernethie | Mr. Richard's son. Deceased. |
| | Gordon | Abernethie | Mr. Richard's eldest brother. Was killed in the war. |
| | Geraldine | Abernethie | Mr. Richard's sister. Deceased. |
| | Leo | Abernethie | Mr. Richard's brother. Deceased. |
| | Laura A. | Crossfield | Mr. Richard's lost sister. |
| | Timothy | Abernethie | Mr. Richard's sad, disabled brother. |
| | Helen | Abernethie | Mr. Leo's wife. |
| | Janet | | Mr. Richard's servant. |
| | Marjorie | | Mr. Richard's cook. |
| | Mrs. | Jacks | Mr. Richard's cook. |
| | Mr. | Entwhistle | Executor of Mr. Richard's will and his personal friend. |
| | Bollard | | Mr. Entswhile's partner. |
| | Maude | Abernethie | Timothy's wife. aka: Mrs. Timothy. |
| | George | Crossfield | Laura's son. Stockbroker. |
| | Rosamund | Shane | Geraldine's daughter. |
| | Susan | Banks | Gordon's daughter. |
| | Pierre | Lansquenet | Cora's husband. |
| | Cora A. | Lansquenet | Mr. Richard's youngest sister. |
| 3 | Mollie | | Kitchen maid. |
| | Gregory | Banks | Susan's husband. aka: Greg. |
| | Michael | Shane | Rosamund's husband. aka: Mick. |
| | Dr. | Barton | Timothy's doctor. |
| 4 | James | Parrot | Bollard's second partner. Mr. Entwhistle's partner. |
| | Miss | Gilchrist | Cora's companion. |
| | Inspector | Morton | Police inspector. |
| | Mrs. | Panter | Cora's housekeeper. |
| 5 | Oscar | | Michael's friend. |
| 6 | Mrs. | Jones | Mr. Timothy's servant. |
| 7 | Hercule | Poirot | Famous detective. Mr. Entwhistle's friend. aka: Mr. Pontarlier. |
| 8 | Dr. | Larraby | Mr. Richard's doctor. |
| 9 | Alexander | Guthrie | Cora's old friend. A celebrated art critic. |
| | Dorothy | | Miss Gilchrist's acquaintance. |
| | Mary | | Dorothy's daughter. |
| | John | Banfield | Miss Gilchrist's acquaintance. |
| | Margaret | | Miss Gilchrist's acquaintance. |
| 11 | Mr. | Cole | Threatened Mr. Greg. |
| | Dr. | Proctor | Miss Gilchrist's doctor. |
| 12 | Mr. | Goby | Hercule's friend. Information specialist. |
| | Sorrel | Dainton | Actress. Michael's colleague. |
| | Mr. | Dainton | Sorrel's husband. |
| | Roseinham | | Film producer. |
| | Oscar | Lewis | Film producer. |
| | Hubert | | Theatrical producer. |
| 20 | Miss | Entwhistle | Mr. Entswhile's sister. |
| 21 | Dr. | Penrith | Doctor in a mental home. |
| 23 | Mr. | Parwell | Police superintendent from Matchfield. |
