 The programmes were transmitted on Nat Geo Wild, Animal Planet and BBC to 157 countries worldwide.The fourth season of the series, "Deadly Pole to Pole" was filmed in 2013–2014 from the Arctic circle to Antarctica, journeying south through the Americas.The scenarios included being hunted by a polar bear whilst kayaking in Svalbard, filming feeding sharks and eagles using timeslice technology, exploring flooded caves and the insides of a glacier, and catching dozens of species of snake and crocodile.