Charmed - 4x14 "The Three Faces Of Phoebe"
Phoebe has a strange sensation about Cole, and she casts a spell to know whether she should marry him or not, bringing unexpectedly an innocent Phoebe from her childhood and a bitter Phoebe from the future to help in her decision. Meanwhile, The Source is getting stronger and possessing Cole, who seems to be unable to resist much longer.