(Piper turns a Prue into ice.) (kicks him. And she's got the power to turn Prue evil and turn you evil too. Cole? Leo: That he can tie a bow tie? Phoebe: It's too late. Piper and Phoebe turn around.) Piper and Phoebe walk over to her. Piper comes in carrying the Book of Shadows.]
Plan: A: A demon; Q: Who tricks Prue into marrying him? A: Piper; Q: Who is the other person who is tricked into marrying the demon? A: Phoebe; Q: Who turns to Cole for help in saving Prue? A: evil magic; Q: What does the Book of Shadows flow towards? A: a recently returned Cole; Q: Who does Phoebe turn to for help in saving Prue? Summary: A demon tricks Prue into marrying him, with the hope that he'll turn her, Piper, and Phoebe evil and ultimately cause the Book of Shadows to flow towards evil magic. When Piper and Phoebe discover this, Phoebe turns to a recently returned Cole for help in saving Prue before it's too late.