In the episode ‘She’s a Man, Baby, a Man!’ the Charmed Ones discover that Phoebe is psychically linked, through her powers, to a man-killing succubus.
They cast a spell to find out who the demon. The only glitch is the spell turns Prue (Shannen Doherty) into a man – after all what other bait would attract a succubus.
Steve Johnson’s XFC were responsible for the special effects makeup. Kathryn Miles Kelly and Ani Plotkin were the key makeup artists.