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.

The team makes an incredible discovery while investigating sightings of a large bird of prey terrorizing 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?

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