The TV series displayed an uncanny knack for predicting future events and advances in science, even as it descended into farcical clichés in its third season. Consider this caper:
The Concrete Overcoat Affair Bad guy Louis Strago and a former Nazi scientist plan to redirect the Gulf Stream in order to make Greenland a semi-tropical paradise run by THRUSH, while turning most of the Northern Hemisphere into an icebox. New York, Paris and London will suffer through blizzards in the middle of July.
In fact, scientists today are concerned that if global warming melts Greenland glaciers, the addition of large amounts of fresh water to the Atlantic Ocean will disrupt the themohaline circulation, the process that keeps parts of North America and Europe warm and habitable. The disastrous effect of disrupting the Gulf Stream was portrayed, to an exaggerated degree, in the 2004 movie The Day After Tomorrow.
In 1966, when this U.N.C.L.E. episode first aired, one would have assumed that anyone planning to freeze major cities or even risk such an outcome would be considered criminally insane. Today, they are known as climate change deniers.