Documentary National Geographic Science Showtime

The docu-series follows celebrity correspondents as they travel the globe and explore a range of subjects all having to do with climate change. The correspondents include Jessica Alba, Mark Bittman, Don Cheadle, Matt Damon, America Ferrera, Harrison Ford, Thomas Friedman, Michael C. Hall, Chris Hayes, Olivia Munn, Dr. M. Sanjayan, Governor Arnold Schwarzenegger, Ian Somerhalder and Lesley Stahl.