Ex Libris
Phoebe tries to help the ghost of Charlene, a fellow student who was killed by a demon known as Libris, prevent the publication of her thesis proving the existence of evil. With Prue's help, Phoebe and Charlene try to vanquish Libris before he can kill Phoebe, but are surprised to learn that Charlene's ghost cannot move on to the next plane of existence until she helps Prue solve the murder of another young woman. Meanwhile, Piper's efforts to get the nightclub ready for a performance by "The Goo Goo Dolls" are interrupted when Dan reveals unsettling news about Leo's past.