"Below Deck Down Under" embarks on a wild new charter season in the breathtaking waters of Cairns, Australia, the famed gateway to the Great Barrier Reef. Captain Jason and Chief Stew Aesha reunite aboard the vintage M/Y Northern Sun with a buoyant new crew for a series of turbulent charters with unruly guests and unforgettable ocean adventures. It's anything but smooth sailing for the crew as a boatload of complicated hook-ups, dramatic shake-ups, and unexpected newcomers make waves throughout the season.