| Greta | Ackermann | Kurt's wife. |
| Kurt | Ackermann | The Lagerkommandant. |
| Han | Bethe | Bohr's colleague and friend. |
| Dolly Ida | Blum | Nathan's sister. Aka: Leisa, Doleczki. |
| Isidor | Blum | Nathan's father. |
| Leisa | Blum | Nathan's sister. |
| Nathan | Blum | An intelligence lieutenant in D.C. The U.S. spy. |
| Niels | Bohr | The most respected physicist. |
| Mr. | Correa | An archbishop. |
| Bill | Donovan | Roosevelt's chief spymaster. Aka: The Big Man. |
| Enrico | Fermi | Bohr's colleague and friend. |
| Richard | Feynman | Bohr's colleague and friend. |
| Ernst | Franke | Martin's brother. |
| Hans | Franke | Martin's brother. |
| Martin | Franke | The gruppen fuehrer. |
| General | Graebner | Franke's colleague. |
| Leslie | Groves | Oppenheimer's military overseer. |
| Alexander | Katzner | The man from Jewish World Congress. |
| Rabbie | Leitner | Nathan's instructor. |
| Alfred | Mendl | An electromagnetic physicist. The One Man. |
| Lucy | Mendl | Alfred's daughter. |
| Martr | Mendl | Alfred's wife. |
| Robert | Morgenthau | Roosevelt's treasury secretary. |
| Ricardo | Oliva | A man from the International Refugee Committee. |
| Robert | Oppenheimer | A physicist. |
| Frank | Roosevelt | The current U.S. President. |
| Henry | Stimson | Roosevelt's secretary of war. |
| Peter | Strauss | Bill Donovan's chief and OSS operation officer. |
| Rudolf | Vrba | A camp escapee. |
| Alfred | Wetzler | Rudolf's colleague. A camp escapee. |
| Leo | Wolciek | The young boy that Mendl befriended in camp. |
| Josef | Wrarinski | Nathan's driver. |
| Karl | Wrarinski | Josef's son. |
| Nicolas | Wrarinski | Josef's son. |
| Elene | Zeitman | A 12-year-old jew. |
| Mrs. | Zelworwicz | Mendl's associate. |
| Anja | | Nathan's niece. |
| Chaim | | Nathan's friend. |
| Epstein | | Blum's friend. |
| Fromm | | Ackermann's aide. |
| Fuerst | | One of the camp's guards. |
| Goring | | The Reichmarshall. |
| Greg | | Leo's son-in-law. Natalie's husband. |
| Hedda | | Ackermann's maid. |
| Himmler | | The Reichsfuhrer. |
| Hoss | | The SS colonel. |
| Jakob | | Nathan's friend who was taken by gestapo. |
| Janusz | | The partisan leader. |
| Jared | | Leo's grandson. Natalie's son. |
| Katja | | Strauss's contact. |
| Kendry | | A British military officer. |
| Langer | | A Nazi corporal. |
| Levin | | The head of camp repair team. |
| Luke | | Leo's grandson. Natalie's son. |
| Macak | | The foreman. |
| Markov | | Mendl's co-slaves. |
| Morgenstern | | The rabbi. |
| Muller | | The blockfuhrer. |
| Natalie | | Leo's daughter. |
| Nieholtz | | The camp captain. |
| Ostrow | | An ex bookkeeper. Mendl's acquaintance. |
| Panish | | Mendl's blockfuhrer. |
| Pavel | | The foreman. Aka: The Bear. |
| Radjekowski | | A British military officer. |
| Richter | | One of the guards. |
| Riggs | | A British military officer. |
| Rozen | | One of the prisoners. |
| Scharf | | A German officer. |
| Scharf | | A sergeant major. |
| Schubert | | A musician. |
| Shetman | | One of the prisoners who helped Nathan Blum. |
| Ullie | | A baker from Warsaw. |
| Vacek | | Mendl's kapo. |
| Verstoeder | | Martin Franke's aide. |
| Zichenko | | Nathan's kapo. |
