This week, the story of three young Australians and their mission to rescue an orphaned elephant calf on the Indonesian Island of Sumatra. Sumatran elephants are officially listed as critically endangered, driven out of their habitat by encroaching industries – in particular, palm oil production. It is estimated that there are now only two or three thousand left in the wild. But against all the odds, one Sumatran elephant calf has become a symbol of hope in an otherwise bleak situation. The program has the heart warming story of 'Bona' and three friends mobilising to save her. The three are all ex employees of the late Steve Irwin, who had a particular interest in the plight of the Sumatran elephants. As this episode reveals, some of those closest to the 'Crocodile Hunter' played a key role in the saga...