Against Piper's wishes, Paige and Phoebe summon Grams for Chris' wiccaning. To put an end to the brother's sibling rivalry, Grams puts a spell on them, but in the process turns the sisters back to bickering teenagers.
Meanwhile, Leo consults a demonic seer to find out who attacked Wyatt and learns that he has a connection to Wyatt's attacker, and Phoebe attends an award ceremony with Les, only to end up acting like a love-struck teenager.
original airdate--September 26,2004 rating--5.3 million
music--Charmed Theme song--"How Soon is Now" by Love Spit Love
Trivia: The title is based upon the term "Cheaper by the Dozen".