Episode 7 of "Charmed"
s01e07 The Fourth Sister
Title: The Fourth Sister
Original Air Date: 11/18/1998 on WB
Director: Richard Ginty
Writer: Greg Elliot, Michael Perricone
Guest Stars: Jennifer Badger (Bridesmaid #1), Eileen Weisinger (Bridesmaid #2), Thomas Crawford (Security Guard #2), Barbara Stock (Grace Spencer), Deeny Dakota (Kirsten), Christie Lynn Smith (Allison Michaels), Todd Cattell (Elliott Spencer), Jeffrey Hutchinson (Father Trask), Roy Abramsohn (Doctor), Bill Ferrell (Security Guard #1), James Geralden (Justice of the Peace), David Moreland (Charles), Phoenix Nugent (Seamstress), Leon Fracno (Male Stripper)
Plot Outline:
A troubled teenage girl befriends Phoebe with the hopes of joining the Halliwells, but she's been lured to the dark powers of witchcraft by a sorceress. Meanwhile, Prue tries to find time with Andy and Phoebe and Piper vie for the attention of Leo.