Piper, Phoebe and Paige come to the aid of Mylie, a Mermaid-turned-human, when she shows up looking for their help after a pact she made with an evil Sea Hag begins to go drastically wrong. If she can find a man to claim his true love, she can remain human, if she cannot, she must give her immortal life force to the Hag. Meanwhile, Phoebe attempts to divorce Cole, until he shows up claiming to want her back. Paige, after having a spell backfire and changing her hair red, must also juggle her new position as a full fledged Social Worker, as well as being a Charmed One. Piper must protect her unborn baby, and face her fear of water (stemming from their mother's death)when she develops panic attacks, when faced with danger.

Piper, Paige and Leo struggle to convince Phoebe, now a mermaid, to come back to her life as a Charmed One, when she decides to "swim" away from her problems with Cole. Meanwhile, Piper casts a spell to stop her panic attacks but instead of facing her fear, she suppresses it, endangering herself and her baby, when a sea Demon comes after her mermaid sister, Phoebe. In order to help Phoebe, Paige takes drastic measures and enlists the aid of Cole, and his newfound demonic powers. Piper's baby apparently has a wealth of knowledge since she is able to use her powers to write "Grandma and Mommy" in the photo album but I believe it was the spirit of Patty Halliwell, Piper's mom. Due to the fact that the style of writing was the same as was in Piper's baby book. Paige quits her job, ironically the day after she received a promotion, focusing her life on saving innocents.

An evil witch traps the Halliwell sisters in distorted versions of classic fairy tales, where Phoebe attends a ball as Cinderella and meets Prince Charming, Paige has a taste of Snow White's poisoned apple, and Piper encounters a big, bad wolf, as Little Red Riding Hood. If you can still remember that Phoebe's fantasy fairy tale is Cinderella.

Cole and Phoebe both fall under the spell of the Siren, who lures husbands to her and entrances their wives to follow with the intent to kill, leaving Piper and Paige to figure out how to save Phoebe. Piper, upset with Leo because he does not understand the challenges of being pregnant, and Leo, frustrated that Piper does not realize the demands of being a Whitelighter, have their personas switched magically by their unborn child.

When a demon crosses a boy into turning him into an evil comic book villain so he can steal an Elder's powers, the boy transforms The Charmed Ones into comic book heroes with superhuman strengths to prevent this from happening.

While seeking the advice of a fortune teller regarding her missing power of premonition, Phoebe discovers that there is a demon who has been stealing the eyes of Gypsies. Meanwhile, Piper wants to see an OB/GYN about her baby, but Leo is concerned about the threat of exposure. And when Phoebe got her power's back it was even more stronger.

Cole desperate to be good allows Paige to perform a spell to cast the evil out of him, but repurcussions are not far behind, when the evil emerges and takes the form of a black shadow. When the Charmed ones attempt to help him, they are trapped inside a haunted house, by this new threat.

Six months from now - While trying to save an innocent man over and over again, Phoebe falls in love with Miles, until she is killed. Cole is back in the Underworld and when he finds out about the death of Phoebe, that his love has died, he sends the Warlock Barraca back in time to tell his past self about this tragedy, in order to save Phoebe by killing Miles. Phoebe inadvertently opens a tunnel in time by repeatedly saving the life of her new boyfriend, Miles, who has been preordained to die. The time tunnel provides a pathway for a warlock from the future, Bacarra, who steals the Book of Shadows and uses its power to kill two of the Charmed Ones, leaving the last remaining sister to reverse the chain of death.

Paige gets to know the Whitelighter in her, when she meets her first charge, a man named Sam, she didn't know to her it was actually her real father. Meanwhile Cole tries every possible way to get himself vanquished by the Charmed Ones. Piper and Leo have problems in finding a magical creature that does the babysitting part, and things go bad to worse when they're poisoned by a Darklighter, leaving Sam as the only one who can save them.

When a man named Jarec desperately needs a witch's body to contain the spirit of his lover Isis, he kidnaps Phoebe. When Cole discovers this situation he offers up Paige in exchange for a mummified Phoebe, because time would stand still for her and Cole is full of hope of winning back Phoebe's love sooner or later.

After kidnapping Phoebe, Cole sends a Shape-shifter to assume Phoebe's identity to help him manipulate Piper and Paige into giving him ownership of the Manor, allowing Cole access to the powerful Nexus located beneath the house. While Phoebe plans her escape, Cole uses his power to have Paige arrested and to make sure Piper's club fails to pass health inspections.

In his twisted attempt to win Phoebe back, Cole casts a spell that alters reality, eliminating Paige and destroying the Power of Three. Paige suddenly finds that her sisters have no knowledge of her existence - Phoebe is trapped in an unhappy marriage and Piper is a demon-killing vigilante consumed with avenging Prue's death. Paige finally convinces Piper to trust her, and together they help Phoebe vanquish Cole forever.

The Council of Witch Doctors makes a house call to The Charmed Ones and use voodoo dolls to lead them down various paths of self-destruction: Paige abducts her former boyfriend's fianc�e and takes her place a the wedding, Phoebe poses for a magazine centerfold to increase readership of her column, while Piper almost destroys the manor when she becomes an obsessive cleaner.

A demon attacks The Charmed Ones with dream dust, causing their nightmares to come to life. Paige is harassed by an evil clown at a baby shower, Piper has an affair and Phoebe is chased by a maniac with a chainsaw. The sisters must use magic to put themselves to sleep to re-enter their nightmares and unmask the symbolic meaning of their dreams.

Phoebe and Paige go to a summit meeting with the leaders of evil and discover that all magic - both good and bad - has disappeared enabling the leaders to steal Piper's about-to-be-born baby and welcome the twice-blessed child into the kingdom of evil. Meanwhile, Piper goes into labor, while Phoebe and Paige must find a way to save the baby without magic.

When Piper's baby is nearly kidnapped by demons, Paige goes undercover to track down the kidnappers at a demonic black market, but is captured before she can vanquish them. The demons use Paige as a decoy to distract Piper and Phoebe away from the Manor to launch an attack on Leo and the baby. Meanwhile, Phoebe is smitten with her new boss, Jason Dean but is under fire when he questions her integrity.

The Charmed Ones join forces with a Leprechaun when they go after a demon who is killing Leprechauns and stealing their magic. To reward them for their efforts, the Leprechaun grants each sister good luck, enabling Paige to gain wealth, Phoebe to meet a new man and Piper to book a major rock star for P3. When the spell wears off, the demon casts a bad luck spell on the sisters and kidnaps Piper. In the meantime, Phoebe and Paige must rally the Leprechauns to reverse their bad luck and rescue Piper.

When Piper and Leo see a marriage counselor to work out their marital problems, Piper casts a spell that lets them literally see the key moments of their past. However, the spell goes awry and Phoebe and Paige are sent back in time to relive Piper's memories. Unbeknownst to Phoebe and Paige, a warlock is also caught up in Piper's spell, and uses the opportunity to try and kill The Charmed Ones' cat, their "familiar," which would permanently alter their future.

When a demon kills the satyr of the Spring of Life, the satyr's underlings, a trio of wood nymphs, escape to San Francisco to find a new leader. After the nymphs magically transform Paige into one of them, they are all captured by the demon, Tull who forces them to lead him to the Spring. Piper and Phoebe must rescue Paige before the demon destroys the forest with his newfound powers.

The Charmed Ones are weakened when an old Crone magically steals their senses making Piper blind, Phoebe deaf, and Paige mute in an effort to steal Piper's baby who holds the vision of "all" power. When the Crone kidnaps Leo in another attempt to steal the baby, Piper, Phoebe and Paige tap into their sixth sense to overcome their handicaps and defeat her. Meanwhile, Piper and Leo are pleasantly surprised to discover that baby Wyatt is coming into his own powers.

When Grams and the Halliwell matriarchs are summoned to bless baby Wyatt, they fall prey to the Necromancer demon who has returned from the Spirit Realm seeking to absorb their magical spirits. Meanwhile, Piper is hurt by Grams' disappointment over the newest addition to the Halliwell family; Phoebe contemplates Jason's invitation, even though it will take her away from her family; and Paige casts a truth spell on her boyfriend to see if he can handle her big, bad secret.

Released after centuries spent entombed beneath the Artic ice, the Titans, Greek mythic gods, set out to eliminate their captors, the Elders. Phoebe and Paige are nearly defeated by the Titans, but are saved by Chris, a mysterious Whitelighter from the future. Meanwhile, Leo makes a decision to give the Charmed Ones the ultimate power to vanquish the Titans, recreating them as Greek Goddesses, despite the risk that they will be seduced by their vast new powers. Phoebe becomes the Goddess of Love, Piper the Goddess of Earth and Paige the Goddess of War. However, Piper's life is turned upside-down when Leo accepts his call to become the new leader of the Elders. Piper's loss and anger consumes her, allowing the Charmed Ones to destroy the Titans.