S1, E5: The teams leave their usual research grounds to see just how far the southern and tropical shark highways extend. Discoveries of new shark hot spots could lead scientists to uncharted sections of migration highways and shark behaviors. Dr. Johan Gustafson and underwater cameraman Colin Thrupp visit Weipa, just west of the northern tip of Queensland. The team endeavors to collect biopsies from the local juvenile and adult bull sharks to see if there is a genetic connection to bull sharks further south. At Greenly Island in South Australia, Dr. Lauren Meyer and Dr. Tom Clarke search for white sharks to prove the area serves like a truck stop in the migration. Local fishermen have reported sightings here, but are they the same sharks the team has already tagged in the Neptune Islands?