One of Our Spies Is Missing Movie (1966) - Robert Vaughn, David McCallum, Leo G. Carroll

Plot synopsis: U.N.C.L.E. agents Napoleon Solo and Illya Kuryakin are sent to Europe where a scientist's age-reversing machine is in danger of being seized by T.H.R.U.S.H. spies.

Director: E. Darrell Hallenbeck
Writers: Howard Rodman, Sam Rolfe, Henry Slesar
Stars: Robert Vaughn, David McCallum, Leo G. Carroll