Watch Lost Monster Files

When Ozarks locals report frightening encounters with a mysterious, dragon-like, cave-dwelling beast, the team conducts their most ambitious hunt yet.

An unknown apex predator is preying on orcas and devouring whales off the frozen coast of Kodiak, AK. The team begins an all-out hunt on land and sea.

The team investigates a stranger-than-fiction murder mystery involving the legendary Wildman of Minnesota, whose body was a 1960s sideshow attraction.

The team makes a discovery while investigating sightings of a large bird of prey terrorizing Chestnut Ridge, Pennsylvania; Sanderson believes it to be the mysterious thunderbird, a razor-clawed predator documented in Native folklore.

The team investigates recent encounters with a monstrous apex predator in the wilderness of British Columbia; using never-before-seen clues from Ivan Sanderson's lost archive, they uncover new evidence that may finally distinguish fact from fiction.

In the premiere episode, the group investigates a series of strange livestock mutilations in the Smoky Mountains that locals fear could be tied to the infamous Chupacabra, which has terrorized the Southwest for decades. Using journals and evidence from Sanderson's archive, the team investigates a rash of deadly encounters in North Carolina to try and document this killer canine...and the possibility that the creature could be migrating east.