BBC Four: The Engine That Powers the World: Timeshift
Looking at the surprising story of the diesel engine - a 19th century invention which is the hidden powerhouse behind the globalised world and is now indispensable. Car enthusiast Mark Evans gets hands on with Rudolf Diesel's original creation, including vintage submarines, tractors, locomotive trains and container ships.
Throughout the 18th Century, hundreds of thousands of Scots emigrated to America. Neil Oliver travels more than 2,000 miles to examine links between racism today in the Deep South and the Scottish settlers that first occupied it.