Witches can't run away from their legacy, at least not the Halliwell sisters -- Prue (Shannen Doherty), Piper (Holly Marie Combs) and Phoebe (Alyssa Milano).
Piper and Paige team up with a magical Wizard to stop the coronation of a new Source, not realizing that the new head of the Underworld is Cole and Phoebe is his Evil Queen-to-be.
S4E18 44 min