One of Our Spies Is Missing (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.

Directed by: E. Darrell Hallenbeck

Starring: Robert Vaughn, David McCallum, Leo G. Carroll, Maurice Evans, Vera Miles, Ann Elder

Links: Metro-Goldwyn-Mayer, IMDb, Movie posters, Movie stills