In this appropriately titled 100th episode of Charmed, the semi-demonic Cole (Julian McMahon) realizes that he will never be able to win back the love of Phoebe (Holly Marie Combs) so long as he is opposed by her half sister, Paige (Rose McGowan). To remedy this situation, Cole links up with the Avatars to make a journey into the past, where he can establish an alternate reality in which Paige never makes the acquaintance of Phoebe and Piper (Holly Marie Combs), and thus never becomes a "Charmed One." The plot thickens when the demons of the past rear their ugly heads, and when Paige suddenly finds herself able to penetrate Cole's alternate reality thanks to a bad cold! ~ Rovi