In "Bite Me", different factions have tried to become ruler of the Underworld so Cole tries to make them all work together to beat good. However, one of the leaders encourages a group of vampires to rise up and rebel, which they do so after Cole refuses to listen to them. He almost gets exposed by Paige when she orbs in his home but he quickly covers this up by saying he has a migraine, hence why the blinds were down. The vampires try to turn Paige into one to get the other sisters and then overthrow the Source and become the new leaders. To keep himself on top, Cole kills the Queen after Phoebe and Piper inadvertently tell him what to do. Phoebe later discovers that she is pregnant before informing him in "We're Off to See the Wizard."