Australia is a world of wildly diverse landscapes and stunning beauty. But beneath the surface lies a seedy underbelly brimming with some the most toxic, ruthless, and dangerous creatures on the planet. This four-part series explores the continent's forests, swamps, deserts, and coastlines, gathering a murderer's row of merciless predators. From rainforest scorpions and Tasmanian devils, to great white sharks and redback spiders, to perenties and desert pythons, we shine a light on the Deadliest Australians found on land, sea and air.