- HD 1080
- Runtime: 100m.
- Status: Released
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- Languages: en
- Country: United States of America
- Director: E. Darrell Hallenbeck
- Stars: Robert Vaughn, David McCallum, Leo G. Carroll, Maurice Evans, Vera Miles
- keywords: spy
- Production_studio: Arena Productions, Metro-Goldwyn-Mayer
- The One of Our Spies Is Missing is featured in the top rankings of 1966
- #33 in Top Adventure Movies of 1966
A biochemist develops a process that reverses ageing but, when he disappears, it's up to Napoleon Solo and Ilya Kuryakin to recover or destroy the process before it falls into the hands of the THRUSH.