The Fourth Sister
Prue tries to find time to be with Andy while Phoebe and Piper vie for the attention of their handyman, Leo. A troubled teenager, Aviva, befriends Phoebe with the hopes of joining with the sisters. Aviva has been lured to the dark powers of witchcraft by Kali, an evil sorceress, who has given Aviva a mission to gain the sisters' trust and steal their powers.


