Safe Passage: most Republicans in Congress reject man-made climate change, and have blocked legislation for years. But now, things could be starting to change. Bradley Whitford examines the grass-roots efforts to build consensus on Capitol Hill that global warming is a critical issue. On his journey, he learns how to lobby reluctant politicians. And, Ty Burrell takes to the open road to investigate the future of an American way of life, the automobile. Can electric, autonomous and shared-riding cars pave the way to a clean-energy future? Powerful forces are blocking the road.