Synopsis:
Phoebe and Piper come to a realization about Billie and Christy's powers and try to determine how that knowledge can bring back Leo. Paige rescues her new charge from a pair of Darklighters. Meanwhile, Billie is torn between siding with The Charmed Ones or siding with Christy, who hopes to reveal a wicked side to the sisters by exposing them to a dream world prison.