This episode is about the partnership between Google DeepMind and Commonwealth Fusion Systems (CFS) to accelerate the development of fusion energy, specifically focusing on CFS’s SPARC tokamak machine. This collaboration leverages Google DeepMind's Artificial Intelligence (AI) expertise, particularly reinforcement learning, to address the complex physics problems associated with stabilizing plasma at over 100 million degrees Celsius. A key component of this partnership is the open-source TORAX software, a fast, differentiable plasma simulator built in JAX, which allows researchers to run millions of virtual experiments to optimize SPARC's operations and identify the most efficient paths to achieving net fusion energy, or "breakeven.