Expedition X, Alaskan Lake Monster

S5 E1 • 44m • HDPG

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

S5 E2 • 44m • HDPG

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

S5 E3 • 44m • HDPG

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

S5 E4 • 44m • HDPG

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.