An exploration of the timeless relationship between human civilization and Earth's rivers. Spanning six continents, this visual and musical tour-de-force is by turns celebratory, cautionary, and ultimately hopeful that we are beginning to understand rivers in all their complexity and fragility. Narrated by Oscar Nominee Willem Dafoe. With music by the Australian Chamber Orchestra and Radiohead.

Examine the world's most extraordinary wildlife living in the newest and fastest changing habitat on the planet - cities. The innovative three-part series features a diverse cast of animals that are adjusting to this new world better than predicted, not only applying their natural born skills and abilities to life in the city, but also making amazing physical or behavioral adaptations.

Former Vice President Al Gore presents evidence that the negative effects of global warming have increased since the release of the film "An inconvenient truth" a decade earlier.