S1, E4: Witness the birth, growth and death of an island in the greatest ocean on earth. From the violent volcanic beginnings emerge coral reefs of unparalleled richness supporting large groups of grey reef sharks and giant manta rays. The rising lands of the South Pacific have also given life to some very strange creatures, from the vampire bug that thrives in tropical snow, to the megapode, a bird that uses volcanic springs to incubate its eggs.