Ben Fogle travels to Australia's Northern Territory to attempt a dive with the most aggressive of all reptiles, the saltwater crocodile.
Having successfully undertaken underwater research on the Nile crocodile, will the team of scientists be able to do so here - where it has never been attempted? With humans and crocs sharing more and more territory, the work is more important than ever before as increased conflict is inevitable.
During the programme, Ben uncovers the complicated relationship between croc and man when he meets a grief-stricken aboriginal elder whose favourite giant 'boss' crocodile has been shot dead. The team find it almost impossible to find the right conditions to dive with a 'saltie' and, when they do, they have no idea how it will react.