A dangerous tagging mission in South Australia reveals what sharks eat and why they gather at feeding sites. The team in the north pursue tiger, bull, and hammerhead sharks, and equip one with a 360-degree back camera.

The northern research team head to K'gari, QLD, in the hopes of catching the most elusive shark of all, a pregnant female; the southern team head back to the Neptune Islands.

By day and night, sharks rule our oceans, but what exactly do they do when the sun sets? Our two research teams are on a mission to uncover the mysteries of shark behaviour after dark.

The northern research team head to Orpheus Island, a nursery ground for baby blacktip reef sharks. As blacktips are known for forming social networks, scientists want to uncover how they learn social and survival skills.

The southern and northern teams leave their usual research grounds to see just how far the southern and tropical shark highways extend.

The southern team tests new migration tech and tools that could reduce shark attacks in a popular snorkelling spot; the northern team catches and tags bull sharks to help local swimmers steer clear of birthing mothers.