The island's wildlife is famously strange. Bright, red, giraffe-necked weevils use their necks to build leaf nests, while chameleons stalk the forests, none more intriguing than the pygmy chameleon, the world's smallest reptile, delicately courting a female in its giant world. The fearsome fossa, Madagascar's only big mammal predator, is on the prowl looking for a mate, 15 metres up a tree, and in the southern 'spiny desert', a spider hauls an empty snail shell 30 times its own weight, up into a bush as a shelter; something never before filmed, and possibly never observed in the wild before.
Elsewhere, the stars are the lemurs, Madagascar's own primates. A family of indris leaps like gymnasts among rainforest trees; and crowned lemurs scamper around Madagascar's weirdest landscape, the razor-sharp limestone formations (known as tsingy), which look like something from another planet. And sifakas, ghostly white lemurs, move like ballerinas across the forest floor.
An amazing, secluded island and its unique wildlife come under Sir David Attenborough's spotlight in this remarkable series.