Desc: Cities Held Hostage: Main Basse Sur La Ville: Directed by Martin Frigon. With Henry Aubin, Serge Bouchard, Ariel Engle, Guy Garand. Cities Held Hostage is a vivid history of the enormous conglomerates that have defined North America, transformed our environment and shaped the way we live. Building on a landmark of Canadian investigative journalism about the city of Montreal, the film features the leaders in the pushback against economic behemoths that capitalize on urban sprawl while destroying the land and the landscapes we love.