Beneath the world’s oceans lies a vast and largely unseen network of critical infrastructure that powers modern civilization. Join Richard Campbell as he explores these undersea connections, how they are built, maintained, repaired, and continue to evolve. Modern events show that this infrastructure can be part of warfare, which has significant consequences for the world. Together, these intertwined data, electrical, and petrochemical networks form the hidden circulatory system of the planet—vital, complex, and increasingly essential to global stability and progress.