New presenters Linda Macleod and Donnie Mackay join old hand Murray MacLeod in a new series of Air an Rathad. Donnie joins members of the Highland Car Club on their summer rally through the Great Glen, while Murray takes a spin in Vauxhall's new sports car, the Cascada, to Callanish. Petrolhead Eilidh Mackinnon, from Skye, shows off her Mark 4 Golf, and over in Fife on the Wacky Race Track, all three presenters search for the superhero inside themselves.