when does cole became the source of all evil
Cole Turner In "Charmed and Dangerous", the Source (Peter Woodward) breaks an aged old agreement and consumes the hollow. The Seer (Debbi Morgan) tricks Cole into consuming the hollow which allows him to assist the Charmed Ones in vanquishing the physical version of the Source. It is revealed that the Seer tricked Cole into absorbing the old Source's power, eventually causing him to become the new Source of Evil in "The Three Faces of Phoebe". An older version of Phoebe has turned bitter because of what he has done and warns her to save herself and states that they never got married but she can't help but think what might have been. Present-day Phoebe asks him if he is hiding anything; he says he is not.