Charmed: Ms. Hellfire

"P3 H2O" is the ninth episode of season two of the supernatural fantasy series Charmed and the twenty-third episode of the series overall. It was directed by Craig Zisk and written by Brad Kern. It first aired on the WB Network on Thursday, December 13th, 1999. It is the one-year anniversary of the day that the Halliwell sisters first became witches. Phoebe wants to celebrate by attending a mystical congregation. Things heat up when a demon known as Abraxas emerges and steals the Book of Shadows. Reciting passages from the book backwards, he resurrects several of the Charmed Ones' former vanquished foes, such as serial killer warlock Jeremy Burns, the Woogeyman shadow creature and Nicholas. A disembodied voice warns the Charmed Ones that only the Power of One can defeat Abraxas.