Charmed

Season 1, Episode 7

Episode Title: The Fourth Sister

Air Date: 1998-11-18

Overview:

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 some alone time with Andy and Phoebe and Piper vie for the attention of Leo.