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Episode 4 | 50m 53s | Video has closed captioning.
Dive into a network of unexplored caves under the Yucatan Peninsula with Steve Backshall. After trekking through kilometers of scorpion-infested Mexican jungle to reach the caves, he faces the terror of being lost in an underwater silt cloud.
Aired: 02/05/20
Expires: 01/14/24
Q&A
Steve Backshall takes PBS behind his adventures, explains how the expeditions are chosen, and explores our role in protecting these magnificent locations.
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