Phoebe: They're called Collectors. They're a warlock… (Someone walks past them.) They are a warlock breed that drains knowledge out of peoples brains with that weird finger I saw.
Piper: The book didn't say how to vanquish them?
Phoebe: No, it just said their hunger for knowledge is your all.
Piper: Okay, whatever that means. Are you sure this is where he lives?
Phoebe: The hospital record said 5D.Here it is.