Exploring water plants, some of which can count and hunt; some water plants escape from animals by rolling away or creating bubbles.
Plants use strategy, deception and feats of engineering in order to survive the challenges posed by the different seasons.
Exploring the hostile world of the desert and how plants survive by using weapons, camouflage and surprising alliances with animals.
David Attenborough explains how humans help plants that are facing extinction, from projects in Africa to re-seeding the landscape to rebuilding a Brazilian rainforest tree.