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One reason that tales of espionage and secret agendas continue to thrill and entertain, generation upon generation, might be the cyclic nature of history and politics. Producer Steve Clark-Hall suggested: "Without going too deep with the Edward Snowden case and the massive amount of recent revelations about the sort of spying that still goes on, I think it's something that people are intrinsically fascinated by - the nature of relationships and the opportunity for betrayal, the complex alliances nations find themselves in, and not being sure who to trust. In some ways today's world is reflective of the tensions of the '60s that the movie plays on."
Napoleon Solo's trick of removing a tablecloth from a table while leaving all the objects undisturbed was not a visual effect. Henry Cavill actually performed it himself, having been trained in the trick by British variety star Mat Ricardo.
Henry Cavill and Armie Hammer often performed their own stunts. Hammer was more enthusiastic about his stunts, to the point that his stunt double joked that he hardly had a chance to do anything because he was out there doing it all by himself.
Henry Cavill admitted that he was very relieved to not have a shirtless scene in this movie after a string of movies where he had to be in top shape. Cavill said that he was glad to focus on his performance for once and not his physique, which he said took an enormous amount of work to present on screen.
Armie Hammer watched The Man from U.N.C.L.E. (1964) before starting production to prepare for his role as Illya Kuryakin. He was the only member of the cast to do so.
Armie Hammer confessed to being awed by co-star Henry Cavill upon first meeting him. Hammer recalled, "I was overwhelmed by his good looks, his chiseled body, his muscles, pretty much everything. There was the whole package there."
David Beckham: as the projectionist at the beginning of the movie, when Illya is being briefed about Solo.