The team investigates a series of livestock mutilations in the Great Smoky Mountains that some believe link to the infamous chupacabra. Using evidence journals from Sanderson's archive plus new clues, the team attempts to confront the killer canine.

The team makes an incredible discovery while investigating sightings of a large bird of prey terrorising Chestnut Ridge, PA. Sanderson believed it to be the mysterious thunderbird, a pterodactyl-sized, razor-clawed predator documented in Native folklore.

The team investigates a stranger-than-fiction murder mystery involving the legendary Wildman of Minnesota. Also known as the Ice Man, its body became a sideshow attraction that Sanderson examined himself before it mysteriously disappeared.

A mysterious apex predator is stalking orcas and boats off the coast of Kodiak, AK. Sea monster sightings, first studied by Sanderson before his death, have spiked in that area recently. Can the team finish Ivan's hunt and finally document the creature?

Ozarks locals report frightening encounters with a mysterious, dragon-like, cave-dwelling beast. Believed to be the legendary Gowrow, the team conducts their most ambitious hunt yet -- above and underground -- and makes a fascinating discovery.