Phoebe and Paige realize that their world is now too good.The shift between universes causes Piper's memory to be erased,and Gideon tricks her into casting a spell on Phoebe and Paige so that they,too,forget Gideon's evil intentions.
Zankou sends his underlings to attack Leo in hopes of luring the sisters out of their house so that he can paghahanap for the Nexus and release the Shadow, the ultimate power.