Cast
Damien BoisseauNarrator (voice)- Laurent CavroisSelf - President of LISEA from 2014 to 2017
- Gilles GodardSelf - Project director of COSEA from 2014 to 201
Bertrand LemoineSelf - Engineer, architect and historian- Stéphane CarrerSelf - Construction director of the Dordogne viaduct
- Romain NicolasSelf - Technical director at Dodin Campenon Bernard
- Olivier GouinSelf - Industrial director at MESEA
- Christophe Pélissié du RausasDevelopment director at Vinci
- Nicolas NotebaertSelf - Managing director of Vinci Concessions
- Hubert BoninSelf - Historian
- Anne-Laure TéchenéSelf - Project director at SNCF Gares & Connexions
- Gérald BassezSelf - Civil engineering expert at MESEA
- Caroline DemilcampsSelf - Environmental manager at LISEA
- Hervé Le CaignecSelf - President of LISEA
- Christophe BergerSelf - Project director at SNCF Gares & Connexions
- Jean-Bruno DelrueSelf - President of MESEA
- Mathieu CailleteauSelf - Track and catenary maintenance team leader
- Delphine Rodrigues da SilvaSelf - Assistant track and catenary maintenance team leader
- Gilbert MaurelSelf - Assistant director of the Villognon maintenance base
- Nicolas QuatremèreSelf - Operations Manager at SNCF Réseau
- Alain BaradatSelf - Scheduling, planning, and railway interfaces manager
- Valérie Vesque-JeancardSelf - President of Vinci Railways
Crew
- Cédric CorreCamera Operator
- Florence GlineurAdministration
- Hugues PhilySound
- Emmanuelle MartiAdministration
- Guillaume GizardSound Mixer
- Raphaëlle GirottoProducer
- Augustin FargesEditor
- Vanessa ColombelColor Grading
- Lou MastroianniProducer
- Olivier LacazeWriter
- Hugues PhilyCamera Operator
- Cédric CorreSound
- Lynsey HaguenauerProducer
- Émilie DeyzacGraphic Designer
- François DavinCamera Operator
- François DavinSound
- Robert IseniSound
- Alexandre TurpinAdministration
- Olivier LacazeDirector
- Robert IseniCamera Operator
- Faustine DeffobisAdministration