Julien Bocher
Role(s): Narrator (voice)
Nicolas Joseph
Role(s): Self - Sewer basic service
Raphaël Morera
Role(s): Self - Historian, CNRS
Konstantinos Chatzis
Role(s): Self - Historian, Gustave Eiffel University
Christophe Dalloz
Role(s): Self - Water and sanitation services manager
