In her own Jurassic park in Surrey, Liz Rigbey uncovers some of the world's oldest plants; Nick Wray looks at plants that can be grown in the unlikeliest of places; and Lynda Brown harvests the rewards from her cooks' garden.
Introduced by Geoff Hamilton. Series producer Laurence Vulliamy Executive producer TonyLaryea
A Catalyst TV production for BBCtv