Two years ago Horizon asked some Natural History film makers to make a film and then, in the intervening years, filmed how they did it.

How, for example, do you get cameras inside birds' nests that are in dark holes in trees, or into the bottom of an insect-eating pitcher plant to film the plant's eye-view of its dinner? How do you arrange for a pike to catch a stickleback successfully in full view of the camera and lights?

And how do you cope with film of a stickleback's egg where you need a magnification so great that the vibrations from a passing lorry wreck the shot?
All this you can see... plus the film they were making. It's probably the most detailed ever made of the life of the stickleback, even down to the way he sees the world through a haze of tiny animals that lodge in the lens of his eye.