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