U.N.C.L.E. agents Vaughn and McCallum try to put a stop to Palance's plan to shift the course of the Gulf Stream in this rehash of episodes from the "Man From U.N.C.L.E." TV series, edited together to form a feature for theatrical release. Leigh plays one of Palance's accomplices and is nearly successful in doing McCallum in for good. Apparently fans couldn't get enough of the series on TV, as this proved to be quite a successful venture. The makers of the popular TV program had been sending up James Bond-style spy adventures for some time, but in this film they also poked some satirical fun at the gangster films of the past, and featured performances by a number of veterans of 1930s Warner Brothers' gangster films, including Ciannelli, Jenkins, LaRue, Blondell, Rosenbloom, Barnett, and Cook.