On May 4th, 1974, a small, struggling city in the American West defied the odds and became the smallest city to ever host a World's Fair. This bold move set off a chain of events that continue to shape the region today. Echoes of Expo tells the remarkable story of how Spokane, Washington, turned its crumbling downtown into a vibrant global stage, hosting the first environmentally-themed World’s Fair and redefining what these global events could stand for. Across 7 episodes, we trace the history and impact of Expo, 50 years later: A poisoned river brought back to life, Native traditions reclaimed, and the spark of an environmental movement that would sweep the nation. We examine how stories are lost as old buildings are razed, and how Spokane once found itself at the heart of the Cold War. Ultimately, this series isn’t just about a World’s Fair. It’s about how a single bold vision - and the courage to pursue it - can transform a community forever.