A seductive and ruthless spy in the service of Germany steals state secrets- including the formula for poison gas-from England and France during World War I. British intelligence, in turn, tries to hunt her down.
| Art | Mario Chiari | Production Design |
| Production | Dino De Laurentiis | Producer |
| Directing | Alberto Lattuada | Director |
| Editing | Nino Baragli | Editor |
| Camera | Luigi Kuveiller | Director of Photography |
| Sound | Ennio Morricone | Original Music Composer |
| Production | Bianca Lattuada | Production Manager |
| Writing | H.A.L. Craig | Screenplay |
| Production | Alfredo Nicolai | Production Supervisor |
| Production | Aleksandar Krstić | Production Manager |
| Writing | Vittoriano Petrilli | Story |
