The Grid has been described as one of the preeminent engineering accomplishments of the 20th century and the world's largest machine. However, when people debate the best strategies to manage a successful energy transition they often limit their analysis to electricity generation. What is neglected is the elephant in the room: the grid. There is an obvious reason. To non-specialists it is complicated. My guest Meredith Angwin is going to help us get a grip on the grid so that we can make informed decisions about the best way to move forward to clean, reliable electricity that can get us to deep decarbonisation while meeting the demands of the world's poor to fight their way out of energy poverty. Meredith is a physical chemist and one of the first women to be a project manager at the Electric Power Research Institute. Over her career she has headed projects to help power plants become more reliable and less polluting. In the past decade, she has studied the grid as a system, and taken part in grid oversight and governance.