Greg discovers more of the prolific wildlife on Christmas Island.

Greg dives into the deeps of Christmas Island to swim amongst coral gardens and frolic with tropical fish and some incredibly rare Whale sharks.

The two Tim's try to squeeze as much action and excitement as they can into 24 hrs in Australia's most exciting city, Sydney.

Greg visits the worlds largest sand island - Fraser Island. Then, we take a plunge into the caves of Sydney to go diving with Grey Nurse sharks.