| 1 | | | The Protagonist |
| | Roderick | Alleyn | The Chief Detective Inspector. aka: Rory. |
| | Helena | Alleyn | Roderick Alleyn's mother. aka: Lady Alleyn. |
| | George | | Lady Alleyn's elder son. |
| | Grace | | George's wife. |
| | Sarah | | George and Grace's daughter. |
| | Evelyn O'Brien | Carrados | A London socialite. Formerly Evelyn Curtis. aka: Donna. |
| | Paddy | O'Brien | Evelyn Carrados' first husband. |
| | Bridget | O'Brien | Paddy and Evelyn's daughter. |
| | Herbert | Carrados | Evelyn's second husband. aka: Bart. |
| | Lord Robert | Gospell | A London aristocrat. Alleyn's friend. aka: Bunchy. |
| | Violet | Harris | Evelyn Carrados' secretary. |
| | Lucy | Lorrimer | An elderly socialite. aka: Lady Lorrimer. |
| | Columbo | Dimitri | A London caterer. |
| | Sistine Madonna | | An oil painting. |
| | Raphael | | Italian painter and architect. |
| | Arthur | Marsdon | Evelyn's uncle. |
| | Donald | Potter | Lord Robert's nephew. |
| | Daniel | Davidson | A physician to London elite. |
| | Agatha | Troy | A famous painter. |
| | Mildred | | Lord Robery's sister. |
| 2 | | | Bunchy |
| | Brer | Fox | A detective inspector. |
| | Mrs. | Halcut-Hackett | A social-climbing blackmailing victim. |
| | Johann S. | Bach | A German composer. |
| 3 | | | Sequence To a Cocktail Party |
| | Maurice | Withers | Donald Potter's friend. aka: Wits. |
| 6 | | | Bunchy Goes Back to The Yard |
| | Hughie | | A band leader. |
| | Paul | Verlaine | A French poet. |
| | Dr. | Curtis | A surgeon. |
| 7 | | | Stop Press News |
| | Broomfield | | Bunchy's eldest nephew. |
| | Miss | Smith | Miss Harris' friend. aka: Smithy. |
| 8 | | | Troy and Alleyn |
| | | Bailey | One of Alleyn's men. |
| 9 | | | Report From Mr. Fox |
| | James | Carewe | A detective constable. |
| | Trelawney | Caper | One of Carrado's acquaintances. |
| | Percy | Percival | One of Carrado's acquaintances. |
| 11 | | | Captain Withers at Home |
| | Albrecht | Durer | German painter, printmaker, mathematician, and theorist. |
| | | Thompson | A detective sergeant. |
| 12 | | | Report from a Waiter |
| | Francois | Dupont | Dimitri's personal servant. |
| 13 | | | Dimitri Cuts His Fingers |
| | | Anderson | Carawe's acquaintance. |
| 16 | | | Lady Carrados Looks Back |
| | Anthony | Bank | Paddy's greatest friend. |
| | Dr. | Bletherley | A superintendent doctor. |
| 17 | | | The Element of Youth |
| | Sophie | | Evelyn Carrados' maid. |
| 18 | | | Predicament of a Secretary |
| | Walter | | Miss Harris' uncle. |
| 19 | | | The General |
| | George | Alleyn | Roderick Alleyn's father. |
| | Rose | Birnbaum | Lady Halcut-Hackett's acquaintance. |
| | | Titheridge | A police constable. |
| 20 | | | Rose Birnbaum |
| | Joseph | Birnbaum | A painter. Rose's grandfather. |
| 22 | | | Night Club |
| | | Cuthbert | Manager of the club. |
| | Simmons | | A cloakroom attendant. |
| 23 | | | Donald on Wits |
| | Vassily | | Alleyn's old servant. |
| 25 | | | Benefit of Clergy |
| | Edith | | Walter Harris' wife |
| | Humphrey | Ward | English first-class cricketer. |
| | Charles | Kingsley | English clergyman, historian and novelist. |
| | Charlotte M. | Yonge | English writer, editor. |
| | Charles | Dickens | English writer and social critic. |
| | Walter | Scott | Scottish novelist, poet and playwright. |
| | Canon | Worsely | Miss Harris' old friend. |
| 26 | | | Alleyn Plot A Denouement |
| | William R. | Smith | Scottish orientalist and minister of the Free Church of Scotland. |
