What if a man-made virus with the power to melt all plastic became as infectious as the common cold? When a plane crashes in South America, in quite extrodinary circumstances, it's up to Dr Quist's team to avert further disaster.

Genetic engineering? Tampering with nature in a quest to make Superman? The experimentation is still only being carried out on rats, but with dangerous, and deadly results...

The time is fast approaching when a person's entire history - educational, medical, criminal, even financial - may end up as a foot of computer tape in some impenetrable central file. Worse still, a man's future career may depend upon the computer's evaluation. This week the Doomwatch team fall under the baleful eye of a newly established security section.

A new, nuclear-powered rocket is being tested, with the first British astronaut aboard. The smallest error could turn it into a flying nuclear bomb spreading radioactive fallout over a wide area of Europe. And an error does occur.

Four strangely dressed young ladies wearing a checker board patterned miniskirt and silver tights ambush two City Gents with a tray of sweets which they eagerly sample...

A land rover pulls up underneath a light house high up on a cliff overlooking the English channel. Bernard Colley and his daughter Dana sees their friend Captain Tommy Gort coming out of the building to greet them – they think. But instead he is lurching, a haunted expression on his face towards the edge of the cliff. The Colleys are horrified. 'Why the hell isn't Quist here?' says Bernard. They run after him but they are too late. Gort stops at the edge of the cliff, clutching his head in pain. Inevitably, he topples over and plunges to his death.

A small boy runs across a field into a forest, snapping a stick of a tree as he goes. Stick in hand he pauses by a tree to catch his breath while looking around the forest. He hears a noise from the tree above which scares him and he runs off. He sees a squirrel in the tree and throws the stick at it and hides behind another tree. He makes his way up the tree trying to reach the squirrel he threw the stick at. As he gets close the animal falls stiffly from the tree. The squirrel lies dead on the forest floor....

Tough ex-miners in South Wales drinking gin instead of the traditional beer, giving their wives the cold shoulder and secretly turning to cock-fighting. It all sounds wildly out of character to Dr Quist and his team, who investigate despite the fact that all this is taking place in the Minister's own constituency.