The Legend of Sleepy Halliwell

Gideon, Leo's old mentor at Magic School, asks the Charmed Ones for help finding out who at the school cast the spell that conjured up the deadly Headless Horseman. The Horseman is running around decapitating the faculty, and needs to be stopped before he claims more lives. Elsewhere, a shaman student named Enola sends Phoebe on a vision quest to the future, where she learns Chris' true identity.