The Spy in the Green Hat is a 1967 feature-length film version of The Man from U.N.C.L.E.'s third season two-part episode "The Concrete Overcoat Affair". The episodes were originally broadcast in the United States on November 25, 1966 and December 2, 1966 on NBC. The film was directed by Joseph Sargent and written by Peter Allan Fields with the story by David Victor. Robert Vaughn and David McCallum star in the film as they do in the television series. It is the fifth such feature film that used as its basis a reedited version of one or more episodes from the series.

Joseph Sargent was an American film director. Though he directed many television movies, his best known feature-length works were arguably the action movie White Lightning starring Burt Reynolds, the biopic MacArthur starring Gregory Peck, and the horror anthology Nightmares. His most popular feature film was the subway thriller The Taking of Pelham One Two Three. Sargent won four Emmy Awards over his career.