Horizon: In recent years, researchers have started to understand why people love the foods they do, and that there may be a way to make snacks taste sweeter without adding any extra sugar � and it's all down to a trick that happens in the brain. This film meets a scientist who has grown a tomato that is sweeter and juicier than anything likely to be found on a supermarket shelf, and follows those hoping to become elite, professional tasters.

Starring:

Bernard Hill, Jack Fortune

Genre:

Documentary