Over six months, a team of biologists led by George McGavin and Gordon Buchanan (and their specialist camera crew) explore the length of South and Central America to find out how animals have adapted to life in the dark.
The Dark Trailer
The expedition starts in the jungles of Costa Rica where the team are after some of the most frightening nocturnal predators.
Alone in the dark, night-time camera specialist Justine Evans has an exceptionally close encounter with a large male jaguar.
In the first episode, George is on the trail of the most ingenious predator of the jungle - the net casting spider - while Gordon finds ruined temples deep in the jungle as he searches for the bizarre creatures that rule the jungle canopy at night.