Barra discovers County Down's version of Stonehenge and spends a day at the races.
Barra Best hears about the astronomer who fought to keep the railway out of Armagh and the mill owner who paid to get one built. He also ventures into the dark reaches of Ireland's longest railway tunnel.
Barra Best hears how the Fermanagh railways were used in a game of wartime espionage, takes a trip to the barbers, and uncovers the surprising story of Belleek's gallant lady admiral.