Whether trekking through the remote jungles of Cambodia in search of a legendary ape-man or exploring the secrets of the world’s largest cave system right here in the United States, the EXPEDITION X team is taking viewers to the stranger side of the unknown. S4 E1 - Terror in Appalachia（阿帕拉契恐怖山怪） S4 E2 - The Van Meter Monster（凡米特怪物） S4 E3 - Thailand's UFO Cult S4 E4 - Graveyard...