Columns: No. in series | No. in season | Title | Country | Project | Status at production | Original air date
70 | 1 | "Rebuilding New York City's Subway" | United States | New York City subway expansion | Under construction | April8,2011 | 71 | 2 | "Drought-Proofing Australia" | Australia | Wonthaggi desalination plant | Under construction | April15,2011 | 72 | 3 | "Azerbaijan's Amazing Transformation" | Azerbaijan | Flame Towers and Heydar Aliyev Cultural Centre | Under construction | April22,2011 | 73 | 4 | "London's Olympic Aquatic Stadium" | United Kingdom | London Aquatics Centre | Under construction | April29,2011 | 74 | 5 | "Constructing Serbia's Largest Bridge" | Serbia | Ada Bridge | Under construction | June18,2011 | 75 | 6 | "Amsterdam's Futuristic Floating City" | Netherlands | Netherlands land expansion | Under construction | June25,2011 | 76 | 7 | "Building Mumbai 's Modern Airport" | India | Chhatrapati Shivaji International Airport | Under construction | July2,2011