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.

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Main Cast: Robert Vaughn, David McCallum, Leo G. Carroll, Maurice Evans, Vera Miles, Ann Elder, Yvonne Craig, Bernard Fox, Harry Davis, Monica Keating

Director: E. Darrell Hallenbeck

Writers: Howard Rodman, Henry Slesar

Editor:

Cinematographer: Fred J. Koenekamp

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