Jon Frankel meets the marine biologist who is convinced that mermaids exist and examines the social media response to apparent sightings of the mythical creature.

Follows the story of an American scientist who was convicted of killing and cannibalizing two colleagues in the jungles of Flores, Indonesia in 1977.

A team of hunters risk their lives to capture the gigantic man eating crocodile that is terrorising a village in the Philippines. But is there an even bigger monster out there?

A group of five scuba divers get separated from their boat and land on an island inhabited by hungry Komodo dragons - this is their epic survival story.

The number of crocodiles in Australia has boomed – and they’re getting bigger and more deadly. An investigation into murderous crocs and the life-saving attempts to relocate them.

A look at the phenomenon of killer swarms - species all over the world that adapt by swarming together to murder and devour everything in their sight.