Damien Boisseau
Narrator (voice)

Laurent Cavrois
Self - President of LISEA from 2014 to 2017

Gilles Godard
Self - Project director of COSEA from 2014 to 201

Bertrand Lemoine
Self - Engineer

Self - Engineer

Stéphane Carrer
Self - Construction director of the Dordogne viaduct

Romain Nicolas
Self - Technical director at Dodin Campenon Bernard

Olivier Gouin
Self - Industrial director at MESEA

Christophe Pélissié du Rausas
Development director at Vinci

Nicolas Notebaert
Self - Managing director of Vinci Concessions

Hubert Bonin
Self - Historian

Anne-Laure Téchené
Self - Project director at SNCF Gares & Connexions

Gérald Bassez
Self - Civil engineering expert at MESEA

Caroline Demilcamps
Self - Environmental manager at LISEA

Hervé Le Caignec
Self - President of LISEA

Christophe Berger
Self - Project director at SNCF Gares & Connexions

Jean-Bruno Delrue
Self - President of MESEA

Mathieu Cailleteau
Self - Track and catenary maintenance team leader

Delphine Rodrigues da Silva
Self - Assistant track and catenary maintenance team leader

Gilbert Maurel
Self - Assistant director of the Villognon maintenance base

Nicolas Quatremère
Self - Operations Manager at SNCF Réseau