Tom Magliozzi has a problem. The wacky co-host of NPR's Car Talk needs to replace his beloved 1952 MG roadster. But where do you turn to in today's car market? Is new technology about to transform the way we drive? Join Tom and brother Ray as they take a light-hearted but shrewd look at America's four-wheeled future. "Click and Clack" explore everything from a glitzy Detroit auto show to the earnest homebuilders of Boston's AltWheels Festival, from a hydrogen-powered bus fleet in Iceland to a green think tank in Colorado. They check out hybrids that plug in to a household outlet and an electric sports car that goes 0 to 60 in 4 seconds. Tom and Ray meet experts in biofuels and lithium batteries, mixing sharp observation, slapstick, and probing interviews. With soaring prices at the pump and worries about the global greenhouse, it's no laughing matter. But the car guys turn an expert, comic eye on the promise and pitfalls of tomorrow's auto tech.