Rivers of Gold - S1.E1

California is a land of extremes - tallest, deepest, highest, hottest. It's home to the richest biodiversity in the Americas, from gray whales traveling the California Current to mountain lions in the Sierra Nevada and redwoods harvesting water from the air. In a rapidly changing and thirsty world, drought, dams and fire pose dire threats to an ecosystem connected by rivers on land, air and sea.