 | Damien Cochereau als Narrator (voice) |
| Pierre-Antoine Davanne als Self - Chief engineer for the tunnel boring machine |
| Florent Martin als Self - Project manager of the construction |
| David Demiere als Self - Conveyor team leader |
| Anaïs Barrel als Self - Geologist |
| Paul Gatinel als Self - Geotechnician |
| Jacques Triclot als Self - Project manager |
| Rémi Fortanété als Self - Chief engineer |
| Franck Joet als Self - Surveyor-Topographer |
| Bernard Sosnowski als Self - Manager of the voussoir factory |
| Pierre Gaspar als Self - Pilot of the tunnel boring machine |
| Hugo Hernandez | Director |
| Quentin Domart | Director |
| Hugo Hernandez | Writer |
| Quentin Domart | Writer |
| Grégory Balga | Editor |
| Olivier Jehan | Editor |
| Alexandre Guillorit | Color Grading |
| Guillaume Gizard | Sound Mixer |
| Carine Nonnenmacher | Producer |
| Valérie Ménard | Production Director |
| Bruno Abate | Post-Production Manager |
| Jehan Folqué | Assistant Editor |
| Romain Hirschmann | Administration |
| Fabienne Renoux | Administration |
| Aline Gripon | Administration |
| Margaux Herreman | Administration |
| Jeanne Ngon Mayoh | Administration |
