The British High Command finds itself in the thick of a huge dilemma when it is realized that they have long been infiltrated by spies from a German intelligence group. This all happens during the preliminary stages of the Battle of Britain.
| Directing | Enzo G. Castellari | Director |
| Sound | Francesco De Masi | Original Music Composer |
| Production | Edmondo Amati | Producer |
| Camera | Alejandro Ulloa | Director of Photography |
| Editing | Vincenzo Tomassi | Editor |
| Production | Francesco Campitelli | Production Manager |
| Production | Luis Méndez | Production Manager |
| Writing | Tito Carpi | Story |
| Writing | Tito Carpi | Screenplay |
| Writing | Vincenzo Mannino | Story |
| Writing | Vincenzo Mannino | Screenplay |
| Writing | José Luis Martínez Mollá | Story |
| Writing | José Luis Martínez Mollá | Screenplay |
| Writing | Gilles Morris-Dumoulin | Story |
| Writing | Gilles Morris-Dumoulin | Screenplay |
| Writing | Enzo G. Castellari | Story |
| Writing | Enzo G. Castellari | Screenplay |
| Camera | Giovanni Bergamini | Camera Operator |
| Art | Alberto Boccianti | Production Design |
| Art | Gianfranco Ramacci | Set Decoration |
| Art | Adolfo Cofiño | Production Design |
| Costume & Make-Up | Walter Patriarca | Costume Design |
| Directing | Giorgio Ubaldi | First Assistant Director |
| Directing | Mariano Canales | First Assistant Director |
| Directing | Isabel Mulá | Script Supervisor |
| Camera | Saturnino Pita | Assistant Camera |
| Camera | Francisco Gómez Conde | Assistant Camera |
| Crew | Emilio Ruiz del Río | Special Effects |
| Production | Mario Caporali | Unit Manager |
| Production | Francisco J. Tudela | Unit Manager |
| Production | Enrique Bellot | Unit Manager |
| Costume & Make-Up | Carlos Nin | Makeup Artist |
| Costume & Make-Up | Josefa Pérez | Hairstylist |
| Editing | Gianfranco Amicucci | Assistant Editor |
| Sound | Ezio Marcorin | Sound Effects Editor |
| Sound | Luigi Cipullo | Sound Effects Editor |
| Sound | Fernando Caso | Sound Effects Editor |
| Sound | Pietro Vesperini | Sound |
| Sound | Alberto Moretti | Boom Operator |
| Crew | Pablo Pérez | Special Effects |
| Crew | Eugenio Ascani | Special Effects |
| Sound | Gianni D'Amico | Sound Mixer |