Damien Cochereau
as Narrator (voice)
Pierre-Antoine Davanne
as Self - Chief engineer for the tunnel boring machine
Florent Martin
as Self - Project manager of the construction
David Demiere
as Self - Conveyor team leader
Anaïs Barrel
as Self - Geologist
Paul Gatinel
as Self - Geotechnician
Jacques Triclot
as Self - Project manager
Rémi Fortanété
as Self - Chief engineer
Franck Joet
as Self - Surveyor-Topographer
Bernard Sosnowski
as Self - Manager of the voussoir factory
Pierre Gaspar
as Self - Pilot of the tunnel boring machine
