When Phoebe and Piper discover the existence of their baby half-sister, Paige, they are hopeful that they can reconstitute the formidable Power of Three, but The Source has a mystical two-day window during which he can turn Paige evil forever.

When Phoebe and Piper discover the existence of their baby half-sister, Paige, they are hopeful that they can reconstitute the formidable Power of Three, but The Source has a mythological two-day window during which he can turn Paige evil forever.

New to the witchy world of The Charmed Ones, Paige is learning to control her new telekinetic powers and steals the Book of Shadows from Phoebe and Piper to use the spells for personal gain. Meanwhile, Piper's inability to deal with her sister's recent death makes her vulnerable to the Furies, female demon vigilantes who lure her into their fold.

Paige makes a major blunder when carelessly mixing potions for Piper while secretly wishing she could be in Phoebe's shoes training for combat, and ends up actually switching bodies with Phoebe. While the two sisters try to reverse the spell and struggle to harness each other's powers, they must battle a Zen Master's powerful disciple who has turned evil against his mentor and opened up a portal between two worlds.

Phoebe and Piper don't take Paige seriously when she has a weird feeling about a creepy old house, landing Phoebe in the clutches of a hideous demon and shrunk to a powerless five inches tall. When Paige and Piper also walk into the demon's trap, his collection is complete.

Paige's favourite childhood fairy tale suddenly becomes real, bringing her face-to-face with a past life as an Evil Enchantress from Medieval times and into the arms of a Knight in Shining Armour. Phoebe and Piper go back in time and end up trapped in the Dark Ages.

Phoebe and Paige must work quickly before Piper is tricked into giving up all of their powers when The Source taps into her brain, altering her perception of reality and placing her in a mental institution.

In the midst of mulling over his marriage proposal, Phoebe comes face-to-face with Cole's demonic past when a widow tracks him down seeking vengeance for her husband's murder. Meanwhile, Paige encourages Piper and Leo to test their readiness to become parents.

Phoebe, Paige and Piper must stop warlocks who are enslaving the world's muses to use their divine creative inspiration for evil. In the midst of the assault, Cole becomes testy about Phoebe's rebuffing his marriage proposal and is concerned that without his demonic powers he can no longer protect the love of his life.

Paige is haunted by guilt about her parents' tragic death and blames it on her rebellious youth, so Leo takes her back in time to relive the events leading up to the car accident. Meanwhile, Phoebe and Cole experience a haunting of their own when outlaw ghosts from the 1950s possess their bodies and head to the chapel to get hitched.

While serving on a murder trial, Phoebe has a premonition that reveals the defendant is innocent despite the overwhelming evidence against him. As she desperately stalls in the jury room, Piper, Paige and Leo frantically try to discover the real killer in time to free the wrongly accused man.

When Paige discovers that a 10-year-old runaway is a firestarter, she whisks him to the manor for safekeeping. The gang soon discovers that his foster parents are, in fact, demon bounty hunters, so they protect him while trying to teach him how to use his powers for good rather than evil. Meanwhile, Cole officially proposes to Phoebe using her grandmother's ring - only to discover that the ring is cursed and turns her into the perfect 1950s housewife.

Learning that he is fated to be vanquished by the Charmed Ones, The Source taps into the ultimate power of The Hollow, which consumes all magical power, both good and evil. As he goes after Phoebe, Paige and Piper's powers one by one, the lives of both Leo and Cole hang in the balance.

Phoebe gets pre-marital cold feet and casts a spell to find out if she should marry Cole, which conjures a young, innocent Phoebe and an old, cynical Phoebe to the Manor to help her make up her mind. Meanwhile, Cole is unable to control the evil growing within him as The Source takes over his entire being and the Seer prepares for his rule of the underworld.

Phoebe is hoping that everything will be perfect for her and Cole's wedding, but doesn't know that The Source has completely taken over the groom and is sabotaging the ceremony in order to orchestrate a demonic wedding which will allow their foretold son to be heir to the underworld. Cole's underhanded tactics include secretly sending a powerful demon to disrupt the wedding and planting the seeds of infighting among Phoebe and her sisters, Piper and Paige.

Paige is feeling out of place among the happily married people - Phoebe and Cole along with Piper and Leo. The situation gets worse when Paige becomes convinced Cole's still a demon, while he secretly plots to impregnate Phoebe with his evil spawn.

After 60 years of searching, two ghosts who fought with Leo in WWII come after him seeking revenge for old wounds. When they turn this wrath on his loved ones and kill Piper, Phoebe and Paige face the horror of losing another sister.

With hopes of unseating Cole as the ruler of the Underworld, a Vampire Queen orders her fanged charges to attack Paige and turn her into a blood-sucker to get a Charmed One on their side. Paige's undead transformation isn't sealed until she takes her first victim, and the Vampire Queen urges her to feed on her two sisters, Phoebe and Piper.

Piper and Paige team up with a magical Wizard to stop the coronation of a new Source, not realising that the new Source will be Cole and Phoebe is to be his Evil Queen.

As Phoebe’s unborn bundle of joy starts showing signs of fierce demonic powers and a violent hatred of Paige, The Seer plots to steal Phoebe’s baby and magically place it in her own body, thereby gaining the power bestowed upon the heir of The Source.

As Phoebe's unborn child starts showing signs of fierce demonic powers and a violent hatred of Paige, The Seer plots to steal Phoebe's baby and magically place it in her own body, thereby gaining the power bestowed upon the heir of The Source.

Phoebe, Paige and Piper are visited by the Angel of Destiny, who offers The Charmed Ones the chance to chart a new destiny as a reward for vanquishing The Source of All Evil. The sisters can remain Charmed or choose to relinquish their magic and live normal, demon-free lives.