| 1 | Luke | Fitzwilliam | Protagonist. |
| | Jujube | the II | Outsider derby. Derby listed at a modest 40 to 1. |
| | Mark's Mile | | Outsider's racehorse. |
| | Santony | | Outsider's racehorse. |
| | Jerry | Boy | Outsider's racehorse. |
| | Clarigold | | The second favorite racehorse. |
| | Mildred | | Luke's aunt. |
| | Wonky | Pooh | Miss Fullerton's Persian cat. |
| | Mayang | Straits | Luke's friend. Palestinian police. |
| | John | Reed | Policeman in Wynchwood. |
| | Amy | Gibbs | Ashe Manor housemaid. Killer's victim. |
| | Harry | Carter | Seven Stars Landlord. Killer's victim. |
| | Tommy | Pierce | Bully boy. Killer's victim. |
| | John Ward | Humbleby | A very good man. The killer's next target. |
| | Lavinia | Fullerton | An old lady Luke met at the train who talks about the murder. |
| 2 | Jimmy | Lorrimer | Luke's oldest friend. |
| | Jessie Rose | Humbleby | Dr. Humbleby's wife. |
| | Bridget | Conway | Jimmy's cousin. |
| | Lord Gordon | Easterfield | Bridget's boss. The owner of Ashe Manor. |
| 3 | Mrs. | Anstruther | Bridget's aunt. |
| | Mr. | Abbot | The solicitor of Tommy Pierce. |
| | Dr. Geoffrey | Thomas | Dr. Humbleby's partner. |
| | Alfred | Wake | The rector. |
| | Mr. | Ellsworthy | Owner of the antique shop. |
| | Major | Horton | A man with a bulldog. |
| 4 | Mrs. | Rose | The laundress. |
| | Honoria | Waynflete | Lord Easterfield's former lover. Lavinia's friend. |
| | Mrs. | Pierce | A woman that sells tabacco and newspaper. Tommy's mother. |
| | Giles | | The sexton. |
| | Lydia | Horton | Major Horton's wife. Deceased. |
| 5 | Ben | Stanbury | A 92-year-old man who died. |
| | Jim | Harvey | A mechanic. Amy's lover. |
| 8 | Anna | Helm | The nursemaid killer. |
| | Mr. | Pierce | Mrs. Pierce's husband. Tommy's father. |
| | Emma | Jane | Tommy's sister. |
| 9 | Mr. | Hobbs | The church warden. |
| | Mrs. | Carter | Harry's wife. |
| | Lucy | Carter | Harry's daughter. |
| 10 | Rose | Humbleby | Jessie and John's daughter. |
| 11 | Augustus | | Major Horton's bulldog. |
| | Nero | | Major Horton's bulldog. |
| 12 | Hetty | Jones | The bank manager's daughter. |
| | Johnnie | Cornish | Bridget Conway's former fiance. |
| | Wellerman | Kreitz | Owner of a research laboratory. |
| 14 | Mrs. | Church | Amy's aunt. |
| 16 | Colonel | Waynflete | Honoria's father. |
| 18 | William | Ossington | Luke's friend. aka: Billy Bones. |
| | Elisha | | The little boy. Deceased. |
| 19 | Mr. | Satcherverell | The coroner on Lavinia's inquest. |
| | Bonner | | Policeman. |
| 20 | Emily | | Honoria's maid. |
| 23 | | Battle | Detective. |
