| Sam | Altshuler | A boy that Frankie helped. |
| Samuel | Altshuler | A man who fostered Sammy. |
| Thogden | Barnett | Violet's father. |
| Violet | Barnett | One of Miss Trigg's radio operators. |
| Julian | Brookhouse | The circuit leader. One of SOE's secret agents. Aka: Vesper. |
| Reba | Brookhouse | Julian's wife. Deceased. |
| Charlie | Denson | The head prosecutor. |
| Professor | Digglesby | A retired teacher from Magdalen College. |
| Mark | Dorff | Tom's college roommate. |
| Marie | Dubas | The legendary singer. |
| Henri | Duquet | A man who works at French Resistance. |
| Queen | Elizabeth II | Queen of United Kingdom. |
| Grace | F. Healey | Protagonist. |
| Bernadette | Flemming | Grace's sister. |
| Robert | Frost | American poet. |
| Aunt | Hazel | Marie's aunt. |
| Thomas | Healey | Grace's former husband. Deceased. |
| Hans | Kriegler | A former concentration camp commandant. The head of SD. |
| Mr | MacDougal | A policeman who handles Miss Trigg's case. |
| Colonel | McGinty | The senior military official at Arisaig House. |
| Sir | Meacham | The consul. |
| Captain | Michaels | The royal air force attaché. |
| Eileen | Nearne | One of the secret agents of SOE. |
| Arlene | O'Toole | A trainee who dropped out of Arisaig House. |
| Madame | Poirot | Josie's French instructor. |
| Annie | Rider | Sally's sister. |
| Sally | Rider | One of Miss Trigg's radio operators. |
| Will | Rourke | The pilot who organized Moon Squadron. Julian's cousin. |
| Marie | Roux | One of Miss Trigg's radio operators. |
| Tess | Roux | Marie's daughter. |
| Eleanor | Trigg | The chief recruitment officer of SOE. Aka: Miss Trigg. |
| Tatiana | Trigg | Miss Trigg's sister. |
| Harry | Truman | The current U.S. President. |
| Claude | Turout | Madame Turout's son. |
| Madame | Turout | The safe house's landlady. |
| Josephine | Watkins | Marie's workmate. Aka: Josie. |
| Mick | Willis | Man who works for investigative section of War Crimes Group. |
| Gregory | Winslow | Director of Special Operations Executive. |
| Simon | Wise | A family law lawyer. |
| Albert | | One of the secret agents. |
| Anders | | The barkeep. |
| Annette | | One of Miss Trigg's radio operators. |
| Brian | | An Archivist. |
| Brya | | Marie's workmate. |
| Dodds | | The butler at the headquarters. |
| Frankie | | Grace's friend and workmate. |
| Jane | | A red-haired operator. Miss Trigg's assistant. |
| Lisette | | The proprietor of the whorehouse. |
| Marcia | | Grace's childhood friend. |
| Marcia | | Grace's girlfriend. |
| Maureen | | A working-class girl from Manchester. Brya's colleague. |
| Mortie | | The hotdog vendor. |
| Raquel | | Mark's acquaintance in SOE. |
| Richard | | Tess's father. |
| Tompkins | | One of the agents in SOE. |
| Tony | | Raquel's husband. Mark's friend. |
