The southern team test new migration tech, while the northern team catch and tag bull sharks in a bid to help local swimmers.

Is Greenly Island popular with migrating great whites? Plus, search for a connection between northern bull sharks and their cooler-climate cousins.

A team studies how young blacktips learn social and survival skills, while another tries to catch the sand tiger shark's most elusive behaviour – mating.

Stay up late as the northern team attaches an activity tag to a bull shark, before diving 80 metres deep to put a satellite tracker on a great white.

Track a pregnant shark along the Great Barrier Reef, before searching for signs of mating along the southern coast that could reveal a very shy female megashark.

Embark on a dangerous tagging mission in South Australia, before heading north as a team chases tiger, bull and hammerhead sharks.