The authorities expect the case of Friedel Walter, alias "Dr. Mueller," to be a straightforward one: he was working as a doctor without proper credentials under a false name. But Mehlin, the man in charge of his case, knows that there is more to the story. When he was injured fleeing from a concentration camp, resistance worker Irene asked her medical student boyfriend Walter to give him medical care.
| Directing | Konrad Wolf | Director |
| Writing | Paul Wiens | Screenplay |
| Sound | Joachim Werzlau | Music |
| Writing | Karl Georg Egel | Screenplay |
| Editing | Friedel Welsandt | Editor |
| Camera | Werner Bergmann | Director of Photography |
| Art | Willy Schiller | Art Direction |
| Costume & Make-Up | Elli-Charlotte Löffler | Costume Design |