England, 1940, during World War II. An MI5 officer, codenamed Jack King, infiltrates a network of conspirators, a British fifth column sympathetic to Nazi Germany, in order to control the organization and destroy it in the event of a German invasion. But who was he? A single person or several?
| Directing | Nicolas Cotto | Director |
| Directing | Benjamin Cohen | Director |
| Editing | Sophie Creusot | Editor |
| Editing | Laurence Generet | Editor |
| Editing | Constance Lagarde | Editor |
| Sound | Frédéric Henrich | Sound |
| Camera | Pierre Maïllis-Laval | Director of Photography |
| Directing | Sophie Creusot | Co-Director |
| Sound | Sylvain Decosse | Sound |
| Production | Christine Loiseau | Researcher |
| Sound | Cédric Denooz | Sound Editor |
| Sound | Cédric Denooz | Sound Mixer |
| Editing | Michael Derrossett | Color Grading |
| Sound | Luis de Magalhaes Saldanha | Original Music Composer |
| Sound | Youssef Boukella | Original Music Composer |
| Art | Jean-Paul Aussel | Graphic Designer |
| Production | Cyrille Perez | Delegated Producer |
| Production | Gilles Perez | Delegated Producer |
| Production | Amélie Juan | Producer |
| Writing | Benjamin Cohen | Writer |
| Writing | Nicolas Cotto | Writer |
