Clyde Ware (story and screenplay), Joseph Calvelli (screenplay)
Robert Vaugn as Napoleon Solo, David McCallum as Illya Kuryakin, Leo G. Carroll as Alexander Waverly, Senta Berger as Serena
Taken from Episode 1-8, The Double Affair. In order to steal a highly secret weapon from U.N.C.L.E.'s protection, they create a double for Napoleon Solo, kidnap the original, and put in the fake.