Mourning the death of Prue, Piper and Phoebe must now come to grips with the loss of their oldest sister, and the loss of the Power of Three. However, The Source discovers an unknown sister - the daughter of Patty and her whitelighter Sam, who had been kept hidden, Paige, the now-youngest Halliwell can restore the Power of Three and reunite the sisters' strength as witches.
Elenco: Holly Marie Combs , Alyssa Milano , Rose McGowan , Brian Krause , Kaley Cuoco , Alyssa Milano , Dorian Gregory , Drew Fuller , Jason Lewis , Kaley Cuoco , Ashley Tisdale , Eric Dane , Finola Hughes , Greg Vaughan , Ivan Sergei , James Read , Jennifer Rhodes , Kerr Smith , Nick Lachey , Theodore William King .