Mr. Waverly is the head of the U.N.C.L.E. organisation and was played by the veteran English actor Leo G. Carroll.
Leo G. Carroll had died long before the movie began production, so Patrick Macnee was recruited instead to appear as an entirely different character, Sir John Raleigh, who had, presumably, taken over as Number 1 of Section I, the Director of U.N.C.L.E., after Alexander Waverly had either retired or died, and Carroll's photograph was displayed prominently in many scenes that featured Macnee's Sir John.
Alexander the Great | Alexander Pope | Alexander | Alexander Graham Bell | Alexander Calder | Alexander Pushkin | Alexander von Humboldt | Alexander I of Russia | Alexander II of Russia | Alexander Hamilton | Alexander McQueen | Alexander II | Pope Alexander III | Jason Alexander | Alexander I | Alexander Korda | Alexander McCall Smith | Pope Alexander VI | Alexander von Humboldt Foundation | Alexander III of Russia | Alexander Alekhine | Alexander Mackenzie | Alexander Haig | Alexander Frey | Wizards of Waverly Place | Lloyd Alexander | Alexander Scriabin | Alexander III | Alexander Fleming | Alexander Borodin |