Expedition X, Avalanche Ghost Train

Phil and Jess probe the science behind geology's strangest phenomena while investigating mysterious objects flying around Mexico's tallest active volcano.

Jess and Phil venture deep into the Ozarks to investigate a mysterious predatory beast. New recordings of chilling howls lead to a shocking revelation.

Phil and Jess investigate caverns believed to be portals to the Maya underworld. The sacred cenotes supposedly hide secrets far darker than any legend.

At the site of America's deadliest avalanche, witnesses report bizarre apparitions and feelings of dread. Phil, and Jess test a mind-bending scientific theory.

Phil and Jess search whitewater rapids and a frigid Alaskan lake for a legendary beast that's now the target of serious scientific inquiry.

Deep in the Peruvian jungle, a supersized beast is terrifying locals. Jess hunts for evidence that a legendary creature known as Yacumama is on the prowl.

The team probe reports of a sea monster said to be attacking Bahamian locals. Their hunt, deep into 'blue holes' could expose shocking military secrets.