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.
| Writing | Howard Rodman | Writer |
| Directing | E. Darrell Hallenbeck | Director |
| Writing | Henry Slesar | Story |
| Sound | Gerald Fried | Original Music Composer |
| Sound | Robert Drasnin | Original Music Composer |
| Camera | Fred J. Koenekamp | Director of Photography |
