Despite Leo's return, Piper can't accept her sisters' death and borrows Coop's ring to travel back in time to prevent the fight. She lands when mother Patty was still alive, but takes her advise to ...

(CNN) -- As an openly confessed "Buffy"-"Friends"- "Alias"-aholic, I take pride in getting into shows that probe new ground, have top-notch writing and offer surprising depth. Which is why I'm as ...