Steve Backshall undertakes his final journey of the current series in Expedition with Steve Backshall, venturing into what is described as the largest unexplored cave network on Earth. The season finale airs Sunday, May 18, at 6:15 PM GMT on BBC Two.
For this concluding episode, Backshall leads a team deep beneath the jungles of Mexico. The objective is to navigate further into this vast subterranean system than any previous explorers. The program documents their journey into these uncharted depths, where they discover relics, ruins, and significant natural formations. This last installment caps a series that has followed the naturalist and explorer to some of the world’s most remote and uncharted locations.