Hosted and narrated by actor Matt Damon, this new episode in the series investigates the link between extreme weather events, climate change and threats to national security. Featuring Pulitzer Prize-winning journalist Thomas Friedman, World Bank President Jim Yong Kim, former CIA Director James Woolsey, and environmental visionary Lester Brown, the documentary focuses on recent political conflicts and severe weather events in Afghanistan, Pakistan, Russia, India, the Middle East, the United States and the Arctic.