S1, E3: Swinging between drought and deluge, Australia's tropical Top End is teeming with life and death. When prey is abundant, the nightmares of the North are on the prowl. Saltwater Crocodiles terrorize river systems. Toxic box jellyfish and stonefish lay waste to many creatures in the estuaries. White-bellied Sea Eagles rain death from above. With all of these deadly monsters, nowhere is safe.