Into Patagonia

S1 E3: The Patagonian Lancehead lives further south than any snake in the world. In a vast, windblown wilderness sloping down from the Andes Mountains, the venomous snake's behaviour is still a mystery to science. Reptile hunter and scientist Mark O'Shea heads into Patagonia to track it down, but he's never seen one before, and the Lancehead doesn't like being disturbed.