Directed by
| Pierre Billon | ||
| Karel Lamac | ... | (as Carl Lamac) |
Writing Credits (in alphabetical order)
| Henri-Georges Clouzot | ... | (dialogue) |
| Walter Wassermann | ||
| Hans H. Zerlett | ||
Cast (in credits order)
| Anny Ondra | ... | Anny | |
| Lucien Baroux | ... | Prof. Bock | |
| Marcelle Praince | ... | Miss Flora | |
| Jean-Pierre Aumont | ... | Jim | |
 |
Rachel Launay | ... | Mrs. Bock |
|
|
Henri Kerny | ... | The inspector (as Kerny) |
| Charles Lamy | ... | Prof. Petou | |
Produced by
| Adolphe Osso | ... | producer |
Music by
| Rolf Marbot | ||
| Bert Reisfeld | ||
Cinematography by
| Otto Heller | ||
Editing by
| Ensick | ||
Production Design by
| Otto Erdmann | ||
| Hans Sohnle | ||
Production Management
| Anatol Potock | ... | production manager (as A. Potok) |
Music Department
| Artur Guttmann | ... | musical director (as Arthur Guttmann) |