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).
The Charmed Ones help out Leo's mentor, Gideon, when he wants to find out who cast the spell of darkness over a magic school and conjured the Headless Horseman who has been beheading the teachers.
S6E13 44 min
