In accordance with the series' mythology, witches' powers are tied to their emotions.During the first two seasons, the sisters face various evil beings from week to week.
For its first three seasons in the Wednesday/Thursday pm timeslot, Charmed was the second-highest rated series on The WB, behind 7th Heaven.
At 178 episodes, Charmed was the second-longest drama broadcast by The WB.
After his demise, an annual season-long storyline and several antagonists are introduced in subsequent seasons (occasionally following the "Big Bad" television format).
These include Phoebe's demonic ex-husband, Cole Turner (Julian Mc Mahon), until mid-season five; the scheming, misguided Elder, Gideon (Gildart Jackson), throughout season six; The Avatars until mid-season seven; the demon Zankou (Oded Fehr) until the season seven finale; and, in season eight, powerful sister witches Billie (Kaley Cuoco) and Christy Jenkins (Marnette Patterson), who fall under the influence of the demonic Triad (who earlier feature as early-season three antagonists).
The series initially focuses on the three Halliwell sisters, Prue (Shannen Doherty), Piper (Holly Marie Combs) and Phoebe (Alyssa Milano).
Following Prue's death in the third-season finale, their long-lost half sister Paige Matthews (Rose Mc Gowan) assumes her place within the "Power of Three" from season four onwards.Charmed is an American television series created by Constance M.Burge and produced by Aaron Spelling and his production company Spelling Television, with Brad Kern serving as showrunner.Each sister possesses unique magical powers that grow and evolve, while they attempt to maintain normal lives in modern-day San Francisco.Keeping their supernatural identities separate and secret from their ordinary lives often becomes a challenge for them, with the exposure of magic having far-reaching consequences on their various relationships and resulting in a number of police and FBI investigations throughout the series.However, in the third season, they discover that their ultimate enemy is The Underworld's demonic ruler, The Source of All Evil.