
The series takes a scientific look at creature sightings around the world, with episodes devoted to the Loch Ness Monster, Bigfoot, werewolves and even a Stalinist attempt to breed a race of supersoldiers by cross-breeding humans and apes. The show is described as one-part history, one-part science and one-part, well, monsters.

Investigating sightings of a 60-foot shark that might be a giant new species or a prehistoric survivor in the waters off Mexico's Baja Peninsula; Mexican sailors report being stalked by the "Black Demon."

Across the world, people are reporting increasingly frequent encounters with frighteningly large crocodiles.

An expedition investigates controversial evidence that might confirm a history of sea monster sightings off the coast of Florida.

Divers probe the depths of the North Pacific in an attempt to confirm sightings of a 20-ton octopus, a boneless horror said to be massive enough to attack and sink boats.