The Power of Two

Piper's work leads her to go off to Hawaii, breaking apart the power of three. The evil spirit of a serial killer (Jeff Kober) escapes from Alcatraz Island seeking revenge on his judge and jury, and Andy asks Prue for help with a series of bizarre murder cases. Phoebe and Prue must figure out how to vanquish this evil spirit and stop him from killing again without Piper's help. Andy checks out a murder weapon and Phoebe, cultivating the ability to call on her power at will, forces a premonition, allowing the three to interrupt the killer as he's attacking an elderly juror. Andy quarrels with Darryl Morris, who has been questioned by SFPD Internal Affairs about all the strange, unsolved cases on which the partners have worked. Prue and Phoebe are attacked by the spirit in their kitchen, but Prue takes a potion that kills her so she can fight the spirit on the astral plane. Andy shows up in time to resuscitate Prue with CPR when Phoebe is knocked unconsciousness early in the fight.