Most people are afraid of the "boogeyman"; some good witches like Phoebe (Alyssa Milano) are terrified of the "Woogeyman." Prue (Shannen Doherty) and Piper (Holly Marie Combs) scoff at Phoebe's trepidations, but it's no laughing matter when an earthquake release a genuine Woogyman in the form of a shadow demon -- who immediately takes control of Phoebe's mind and converts her to "badness." All of this puts quite a damper on Phoebe's upcoming party in honor of a famed architectural expert. Jennifer Rhodes makes her first series appearance as the girls' grandmother, Penny "Grams" Halliwell. ~ Rovi