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One Spy Too Many, starring Robert Vaughn and David McCallum, is a 1966 spy film. It is the 1966 feature-length film version of The Man from U.N.C.L.E.'s two-part season two premiere "Alexander the Greater Affair". It is the third such feature film that used as its basis a reedited version of one or more episodes from the series. In this instance, the film took the two-part episode and added in a subplot featuring Yvonne Craig as an U.N.C.L.E. operative carrying on a flirtatious relationship with Napoleon Solo ; Craig does not appear in the television episodes. Both episodes were written by Dean Hargrove and directed by Joseph Sargent.