Damien Boisseau
as Narrator (voice)
Laurent Cavrois
as Self - President of LISEA from 2014 to 2017
Gilles Godard
as Self - Project director of COSEA from 2014 to 201
Bertrand Lemoine
as Self - Engineer, architect and historian
Stéphane Carrer
as Self - Construction director of the Dordogne viaduct
Romain Nicolas
as Self - Technical director at Dodin Campenon Bernard
Olivier Gouin
as Self - Industrial director at MESEA
Christophe Pélissié du Rausas
as Development director at Vinci
Nicolas Notebaert
as Self - Managing director of Vinci Concessions
Hubert Bonin
as Self - Historian
Anne-Laure Téchené
as Self - Project director at SNCF Gares & Connexions
Gérald Bassez
as Self - Civil engineering expert at MESEA
