Episode 83 of "Sabrina, the teenage witch"
s04e08 Aging, Not So Gracefully
Title: Aging, Not So Gracefully
Original Air Date: 11/12/1999 on ABC
Plot Outline:
Sabrina zaps on a skin cream to appear more mature after college-guy Josh shoots down a romance because of her age, but the fast-acting lotion ends up being a rapid-aging potion.
