They're Everywhere
Prue and Piper give in to their fears that the men in their lives may be Warlocks and cast a mind-reading spell to find out the truth. Meanwhile, a group of brain-zapping Warlocks called "Collectors" are after Eric, who has translated ancient tablets that contain all historical events in the past and future. Eric destroys the actual stone tablets, storing the knowledge to his own mind and becoming prey to the Collectors, who want the power of the tablets. Using Eric's father as bait, the Collectors lure Eric to them and zap Phoebe when she tries to help out. Prue and Piper use their ability to read each others minds and trick the Warlocks into zapping each other right out of existence. Luckily, Prue and Piper learn their recent flames are not Warlocks, although Jack has been playing tricks on Prue with his twin brother. Piper takes a romantic leap of faith and heads off for the weekend with Dan.