On 23 October 1952, a television quiz called 'Animal, Vegetable, Mineral?' made its first modest appearance. It was an instant success. Archaeology suddenly became entertainment. The long line of television programmes dealing with archaeology, of which this was the first, were all the creation of one man - Paul Johnstone. Until his death earlier this year he was Executive Producer of Chronicle and head of BBC Television's Archaeology and History Unit. Tonight Chronicle looks back at nearly 25 years of archaeology on television, culminating in an account of the excavation of the Graveney Boat , Paul Johnstone's last venture in an area in which he was recognised throughout the academic world as an expert - the archaeology of ships.