| Prince | Albert | Mr. Quinn's dog. |
| Father | Alphonse | A priest. |
| Mr. | Beresford | One of the medical students. |
| Alice | Black | A prostitute. The owner of the backyard where Therese's dead body was found. |
| Thomas | Brackenreid | The inspector of Murdoch's division. |
| George | Canning | Godfrey's driver. |
| J. | Carveth | A medical bookseller. |
| Dr. | Cavin | The demonstrator. |
| Father | Corbiere | Father Alphonse's friend. |
| Charles | Elrod | The newspaper boy. Aka: Carrot. |
| Father | Fair | The priest at St. Paul. |
| Edith | Foy | Donalda's housemaid. |
| John | Foy | Edith's wife. Donalda's butler. |
| Jimmy | Gallagher | The man who helped Jenkins. |
| Mr. | Grant | The porter. |
| Maria | Jenkins | Alice's deaf neighbor. |
| John | Keene | The steward at the Yeoman club. Aka: Sean Kelly. |
| Arthur | Kitchen | Beatrice's son. |
| Beatrice | Kitchen | Murdoch's landlady and close friend. |
| Mathilda | Kleiser | Mrs. Rhodes's friend. |
| Therese | Laporte | Donalda's housekeeper. Deceased. Aka: Tess, Theresa. |
| Dickie | Latimer | Walter's son. |
| Walter | Latimer | One of Cyril's patients. |
| Mrs. | Lewis | Mrs. Kitchen's acquaintance. |
| James | Mccay | Alice's boss. |
| Hugh | MCDonough | Owen's friend. The Yeoman's medical officer. |
| Elizabeth | Milner | Murdoch's lover. Deceased. |
| Robert | Moffat | A pathologist. |
| William | Murdoch | Protagonist. A detective inspector. |
| Dr. | Osler | A doctor. |
| Mansfield | Otranto | Murdoch's dancing professor. |
| Mrs. | Phillips | The woman who saw the carriage. |
| Samuel | Quinn | Alice and Bernadette's housemate. |
| Lothar | Reinhardt | The founder of the Yeoman club. |
| Cyril | Rhodes | Donalda's husband. |
| Donalda | Rhodes | Dr. Rhode's wife. Therese's boss. |
| Owen | Rhodes | Donalda's son. |
| Joe | Seaton | The stable lad. |
| Sergeant | Seymour | Murdoch's colleague. |
| Godfrey | Shepcote | Harriet's father. An alderman. |
| Harriet | Shepcote | Owen's girlfriend. |
| Mrs. | Spoffard | One of Cyril's patients. |
| Henry | Stanley | A biographer. |
| Mary | Stockdale | Cyril's nurse. |
| Ezekiel | Stone | Martha's father. |
| Martha | Stone | The Rhodes's former housemaid. |
| John | Tinney | Murdoch's acquaintance. |
| Fred | Vose | A shop owner. John's acquaintance. |
| Mr. | Webster | A tailor. |
| Mr. | Webster | Ettie's boss. |
| Bernnadette | Weston | Alice Black's friend and housemate. Aka: Ettie. |
| Oliver | Wicken | A 2nd class constable. |
| Doris | Winn | The Rhodes's new cook. |
| Letitia | Wright | Mrs. Rhodes's friend. |
| Cavendish | | A police photographer. |
| Courtney | | Owen's classmate. |
| Crabtree | | Murdoch's constable. |
| Davidson | | Owen's teacher. |
| Driscoll | | Wiggin's neighbor. Another gossiper. |
| Enid | | Beatrice's new tenant. A widow. |
| Forsyth | | Kelly's assistant. |
| Foster | | Cavendish's colleague. |
| Graham | | A young policeman. |
| Grasett | | The Chief Constable. |
| Humphrey | | The Yeoman club's waiter. |
| Jack | | Alice's friend. |
| Johnson | | Murdoch's associate. |
| Lamson | | A doctor. |
| Llewelyn | | The lone student. |
| Marianne | | Donalda's friend. |
| Minnie | | Kelly's wife. |
| Palmer | | A doctor. |
| Princess | | Mr. Quinn's dog. |
| Pritchard | | A doctor. |
| Richmond | | A policeman. |
| Silver | | The Rhodes's horse. |
| Sprague | | Owen's friend. |
| Tsar | | One of Mr. Quinn's dogs. |
| Wiggins | | One of the gossipers. |
| Zephaniah | | The man who found Alice's dead body. |
