It's interesting that in both '68's Ep #499 and '69's Ep #760 the plot involves aging the current villainess to her true age -
Cassandra in Ep #499:
(http://www.dsboards.com/images/Cassage.jpg)
Laura in Ep #760:
(http://www.dsboards.com/images/Lauraage.jpg)
And how ironic is it that the real alter-ego of the victim of the aging in Ep #499, Angelique, is actually the instrument of the aging of Laura in Ep #760? ;)