This episode uncovers the monumental engineering achievement of William Bald, the brave and pioneering Scotsman who blasted the cliff faces of coastal Antrim into the sea and built a road that was once thought impossible to construct. This unsung engineering hero has been largely forgotten by history, but his greatest work - the iconic Antrim Coast Road, lives on and has changed the lives of the people of The Glens forever. Andrea Bald, William's great-great-great-granddaughter - and by coincidence, an engineer herself - travels to Antrim from her home in New Zealand to discover more about her elusive ancestor.