Megastructures: Deep Sea Drillers follows an attempt to tap some of the most inaccessible natural gas on the planet, in which five high-tech mega vessels will complete a 1,800 square mile gas network, over a mile and a half below the ocean’s surface. At the heart of the project is the enormous gas-processing platform, the Independence Hub. If successful the system will produce enough gas to supply nearly 5 million households in the US.