2415 - In a city in the vice-like grip of its dictator, social division based on I.Q. is marked by coloured overalls. A new Great Wall is under construction to keep lower I.Qs isolated from the world. But a major problem arises for the tyrant who must seek an answer in London. Treachery abounds and plans for world domination are afoot and a nasty surprise is in store for delegates of world cities invited to a meeting. This final story...