Prue: Hey, did Piper come home last night?
Piper: My sisters aren't dead!
Paige: We'll find her, Leo. I promise.
Leo: We have a problem...I can't sense Piper.
Memory Wiper: You see, I have the power to swap memories...more precisely good memories...with bad memories to drive a person into self destruction. For a witch. however...drive them into relinquishing their powers.