08E17 - Generation Hex

Two former students of Leo's from Magic School turn up at the manor to inform the Charmed Ones that demons that Leo had imprisoned in the Magic School dungeons have escaped and are seeking revenge. Christy tries to get Billie away from the sisters, and Billie wants Christy to reunite with her parents. Paige goes on her honeymoon, and Coop continues to follow Phoebe. One of the demons is eventually vanquished by Piper and the students sending him to the Astral Plane in a perpetual vanquish, but beforehand, the two demons kill Billie and Christy's parents under orders from Candor, the last remaining member of the Triad. In retaliation, Christy vanquishes him, but he claims that by doing so she passed her final test.