The Source takes over Cole completely in "Marry-Go-Round". The Seer warns him that marrying Phoebe would be the worst thing possible as they would have a son, the most powerful magical creature ever, who would be on the side of good, following the Charmed Ones' destiny. She tells him the only way the child will grow up evil is if Cole marries Phoebe in a dark ceremony. As the Source, he puts a spell on the Charmed Ones which makes Phoebe spotty and Piper and Paige over sleep. Paige and Phoebe argue as the latter suspects the former of trying to disrupt the wedding, having already made a mistake with the dress. When Paige tries to make an amends with Phoebe's spots it causes her to become invisible.