I LOVE charmed.
I got into it, my freinds mother watched it. (she is wiccan)
I can say ther are elements of wicca in the show. but... just like most things on tv it is warped for a larger audiance.
main reason I like the show? women kick @ss. But acknoledge, blood, and unity are their greatest strength.
wicca is a spiritual trinaty. wear christian beliefs follow the Patriachle FARTHER, SON, and GHOST, wicca follow the matracle DAUGHTER, MOTHER, and HAG.
This aspect is shown in the show, when a spell cast by a single sister and the spectral forms of their mother and grand mother proove stronger than the three sisters themselves. their are other things. like the book of shadows. although a not exacly called the same each "covern" does ducument its practises in a diary that does get handed down the line of succetion.
NOTE- Im no authoratty on such things.