"Plan B: Mobilizing To Save Civilization" is based on the book by environmental visionary Lester Brown. Shot on location around the world and featuring heads of state and some of the world's most original and influential thinkers, Brown's message is clear and unflinching -- either confront the realities of climate change or suffer the consequences of lost civilizations and failed states. Ultimately the program provides a glimpse into a new and emerging economy based upon renewable sources of energy as well as case studies documenting realistic strategies to avoid the growing threat of global warming. Paul Krugman, Tom Friedman, Bruce Babbitt and Tom Lovejoy are among those featured in the program. Matt Damon is the host and narrator.