In the conclusion of Charmed's sixth-season opener (originally telecast as a single two-hour episode), the Charmed Ones have determined that their Whitelighter Leo (Brian Krause) is being held by magical bonds in the afterworld of Valhalla. In order to rescue Leo, the girls must transform themselves into Nordic-legend Valkyries -- a metamorphosis which wreaks unexpected consequences on the mortal population of San Francisco. In other developments, Piper (Holly Marie Combs) remains an amnesiac; Phoebe (Alyssa Milano) tries to stay away from her boss and lover, Jason (Eric Dane), until she is able to control her "empath" powers; Paige (Rose McGowan) encounters difficulties holding down a non-witch job; and a surprising amount of hostility is generated between Leo and novice Whitelighter Chris (Drew Fuller). ~ Hal Erickson, Rovi