Steve's journey has reached the jungles of Guyana.
Steve is on the search for a winged giant, the harpy eagle, but his first find is a feisty two-metre-long snake. Next the team set up base camp on the banks of a remote jungle river. Steve discovers an ant in the camp toilet which has the world's most painful sting, and at night has a chilling encounter with a spider that can reach the size of a dinner plate.
Finally Steve explores below the water of the rainforest rivers. First he reels in a wolf fish with teeth to rival a piranha's, before leaving the safety of the river bank to swim with an animal so deadly that just touching it could stop his heart.