Biologist Pat Spain investigates rumours of an animal, roughly the size of an elephant, possessing a long, thin neck, roaming the Congo Basin.

For over a century a sea serpent known as Caddy has been reported swimming off the coast of British Columbia.

In the Gobi desert, Pat investigates sightings of a weird, acid-spraying monster said to be able to give electric shocks and explode itself when threatened.

Pat Spain investigates sightings of an ape-like animal in Sumatra that walks like a person. Just like Indonesia's extinct `hobbits', could it be another species of human?

Pat Spain travels to the Brazilian Amazon in search of the mythical mapinguari, a fearsome beast said to have one eye and a mouth in its stomach.