Marisol Nichols guest stars as Bianca, a visitor from the future who materializes in the present-day P3 club -- then promptly robs Whitelighter Chris (Drew Fuller) of his powers. Leo (Brian Krause) soon discovers that Bianca is a part of a family of assassin witches, and that dire consequences lie ahead for everyone concerned unless she restores Chris' skills posthaste. Meanwhile, Paige (Rose McGowan) seriously considers moving out of the mansion and moving in with Richard Montana (Balthazar Getty); Phoebe (Alyssa Milano) wants to join Jason (Eric Dane) in Hong Kong in hopes of restoring their relationship; and Piper (Holly Marie Combs) worries that her romance with a firefighter will cause a rift between herself and her son, Wyatt. ~ Hal Erickson, Rovi