Fiona Bruce presents from the National Botanic Garden of Wales in Carmarthenshire, exploring the Victorian mania for collecting exotic plants and examining rare species grown inside the gigantic bio-dome. The team assesses items brought in by the public, with Duncan Campbell inspecting a Chinese box that Hollywood star Gregory Peck tried - and failed - to buy, and John Axford is amazed to see an extremely rare 12th-century bronze statuette brought back from Calcutta in the 1920s.