| Clive | Baillieu | Archie's boss. |
| Jim | Barnes | A reporter. |
| Mr. | Bates | Major Belcher's secretary. |
| Anne | Beddingfeld | A woman who makes sacrifices for the man she loves. |
| Major | Belcher | The assistant general manager of the 1924 Empire Exhibition. |
| Mrs. | Belcher | Major Belcher's wife. |
| Irving | Berlin | American composer. |
| Ralph | Brown | An English writer. |
| Yvonne | Bush | Agatha's old friend. |
| Agatha | Christie | The married name of Agatha Miller. |
| Archibald | Christie | Aviator in Britain. aka: Archie. |
| Campbell | Christie | Archie's brother. |
| Thomas | Clifford | 1st Baron Clifford of Chudleigh. |
| Edmund | Cork | One of Agatha Christie's literary agents. |
| Arthur Conan | Doyle | Scottish physician and author. |
| Sebastian | Earl | Archie's co-worker. |
| Charlotte | Fisher | Christie family's governess and secretary. |
| Bolton | Fletcher | One of Agatha's suitors. |
| Mr. | Fuett | A railway porter. |
| Charles | Furster | A pianist. |
| Charles | Goddard | The head of the Berkshire Constabulary. |
| Anna Katharine | Green | American poet and novelist. |
| Arthur | Griffiths | An Irish writer, newspaper editor and politician. |
| Arthur | Hastings | A soldier. |
| Peg | Hemsley | Archie's mother. |
| William | Hemsley | A schoolmaster from Clinton College. Archie's stepfather. |
| Mrs. | Hiam | Mrs. Belcher's closest friend. |
| William J. | Hicks | A solicitor. |
| Madge | James | Sam's wife. |
| Sam | James | Archie's friend. |
| | Kenward | The chief constable. |
| Mrs. | Kitchings | An employee of Little London. |
| John | Lane | American writer and historian. |
| Horace | Leaf | A psychic. |
| Gaston | Leroux | French journalist and author of detective fiction. |
| Reggie | Lucy | Agatha Miller's fiancé. |
| Max | Mellor | Agatha's friend. |
| Agatha | Miller | A writer. |
| Margaret | Miller | One of Agatha's siblings. |
| Eileen | Morris | Agatha's old friend. |
| Mrs. | Neele | The name used by Agatha while staying at Harrogate Hydro. |
| Nancy | Neele | Madge James' friend. |
| | Pemberton | A nurse. |
| William | Perkins | Archie's solicitor. |
| Wilfred | Pirie | One of Agatha's suitors. |
| Hercule | Poirot | A Belgian refugee. |
| Commander | Reynolds | Scotland Yard's commander. |
| Constable | Roberts | A police officer. |
| Mrs. | Robson | One of Agatha's acquaintances. |
| Dorothy | Sayers | English crime writer and poet. |
| Jessie | Swannel | Rosalind's nanny. |
| James | Watts | Madge Miller's husband. aka: Jimmy. |
| Nan | Watts | Agatha Miller's dear friend. |
| Mr. | Wollesley | One of Agatha's acquaintances. |
| Mrs. | Woods | The building's caretaker. |
| Adriadne | | A Cretan princess in Greek mythology. |
| Antwerp | | One of the wounded soldiers. |
| Auntie-Granni | | Agatha's grandmother. |
| Cuckoo | | Rosalind's new nurse. |
| Granny-B | | Auntie-Grannies' younger sister. |
| James | | Madge Miller's son. aka: Jack. |
| Jane | | A housemaid. |
| King John | | The youngest son of King Henry II of England. |
| King Minos | | The King of Crete. |
| Lilly | | A housemaid. |
| Lucy | | Jane's replacement as maid. |
| Marne | | One of the wounded soldiers. |
| Mary | | A cook. |
| Monty | | One of Agatha's siblings. |
| Peter | | Agatha's dog. |
| Robert | | The son of Archie's gardener. |
| Rosalind | | Archie and Agatha's daughter. |
| Rose | | A waitress. |
| Stevens | | A young policeman. |
| Theseus | | The mythical king and founder-hero of Athens. |
