The Spy in the Green Hat (1966)
The Spy in the Green Hat is a 1966 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. It, as does the television series, stars Robert Vaughn and David McCallum. It is the fifth such feature film that used as its basis a reedited version of one or more episodes from the series.
More at Wikipedia.