After a group of lonely mortal women at a University cast a spell that turns three animals into men and they start wreaking havoc on the town, the Halliwell sisters need to act fast to stop them. Also, Prue has a hard time adjusting to life being unemployed.

Phoebe experiences flashes of one of her past lives when she and her sisters were cousins in the 1920s. However, in this past life, Phoebe was evil and power mad and a curse was bestowed upon her that could affect future Phoebe's life.

A group of three elderly witches, one of them close friends of the Halliwells' grandmother, summon a demon to restore their youth. However, in return, the demon wants the powers of the Charmed Ones.

A warlock brings characters to life from old B-grade horror movies in an attempt to kill the Charmed Ones.

The sisters must find a demon responsible for the murder of one of Phoebe's classmates. Meanwhile, Dan discovers that Leo was previously married, and decides to take matters into his own hands, while Prue attempts to help a man who is looking for a witness to his daughter's murder.

A demon turns people into the embodiment of each of the deadly sins, including the Charmed Ones and Leo.

Cole poses as Belthazar to infiltrate an internet organization run by evil, that plans on controlling the world's information flow on the internet. Meanwhile, the sisters must vanquish the warlock posing as the company's manager without exposing Cole's role in the situation.

Phoebe has a premonition of a murderous banshee while adding on to the Belthazar section of the Book of Shadows, thus causing her to think Cole is responsible. But when the sisters cast a spell it backfires and turns Prue into a dog, and when Prue gets hit by a car, Phoebe's remorse causes the banshee to attack her, turning her into a banshee.

When the Halliwell sisters are exposed as witches on nation-wide television, they form a pact with The Source to reverse time and undo the damage. However, in the process, one of the sisters makes the ultimate sacrifice, placing the Power of Three in mortal danger.

Mourning the death of Prue, Piper and Phoebe must now come to grips with the loss of their oldest sister, and the loss of the Power of Three. However, The Source discovers an unknown sister - the daughter of Patty and her whitelighter Sam, who had been kept hidden, Paige, the now-youngest Halliwell can restore the Power of Three and reunite the sisters' strength as witches.

The Source sends Piper into a deep coma, where she perceives an alternate reality. Phoebe and Paige must find a way to return her to reality and save her from giving up her powers while she is delusional.

The Halliwell sisters must find a way to release Muses which have been abducted by a warlock who is attempting to build an evil faction in the absence of The Source.

Wanting to protect a ten-year-old orphaned boy who is a firestarter, Piper and Leo try to hunt down the demon before he can deliver the kid to The Source. Meanwhile, Phoebe is given Gram's wedding ring by Cole, but to their surprise the ring has been cursed to transform the wearer into a traditional 1950's suburban housewife.

Amongst newlyweds, Phoebe & Cole and already-married, Leo & Piper, Paige begins like a fifth-wheel but she continues her suspicions about Cole. Meanwhile, the Source plots to impregnate Phoebe with his evil spawn.

When two ghosts from Leo's past return to seek revenge, Leo faces his demons by submitting, causing Piper's life to be threatened,leaving Paige to deal with the situation. Meanwhile, Cole tries to convince Phoebe they need a home of their own.

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. Meanwhile, Phoebe attempts to divorce Cole, until he shows up claiming to want her back, Paige, attempts to juggle her new position as a full fledged Social Worker, as well as being a Charmed One, and Piper must protect her unborn baby, and face her fear of water.

Barbas, the Demon of Fear, returns and tricks Paige into giving him Cole's powers, and plots revenge on the Halliwell sisters by playing them against their darkest fears.

When Phoebe must constantly save the life of her new boyfriend, a warlock shows up from the future, claiming that future Cole sent him in order to kill the boyfriend before Phoebe's dies instead. However, present Cole cannot allow this and tries to help the sisters protect Miles, but when the warlock decides to work on his own agenda, by stealing the Book of Shadows, it results in the death of two of the Halliwell sisters. The survivor must decide whether going back to change the past is the right thing to do.

Paige gets to know the Whitelighter in her, when she meets her first charge, a man named Sam, unbeknownst to her is 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.

Phoebe falls prey to Jeric, a demon in search of the perfect body to hold the spirit of Isis, his dead lover. To trap the spirit, Jeric mummifies Phoebe's body. Meanwhile, Cole tries to save Phoebe by making a deal with the demon.

After kidnapping Phoebe, Cole sends a shapeshifter to assume Phoebe's identity to help him manipulate Piper and Paige into giving him ownership of the Manor, allowing him access to the powerful Nexus located beneath the house. Meanwhile, Phoebe plans her escape, and Cole gets Paige arrested and ensures that Piper's club fails to pass health inspections in order to keep them distracted.

The Charmed Ones must protect Piper's son from two demons, but the baby has a few surprises of his own. Meanwhile, Paige goes undercover as a bounty hunter and Phoebe's future with the newspaper is threatened by the new owner.

When the mythic Gods, the Titans, are released and kill all the elders, Leo is forced to take over. Meanwhile, a mysterious Whitelighter from the future guides the Charmed Ones when Leo gives the girls 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.

The Cleaners kidnap Wyatt and erase his existence, after the child accidentally brings a dragon to life. When Piper, Phoebe and Paige regain their memories they relive the day Wyatt was kidnapped. Meanwhile, Paige is caught in the middle of sexual harassment troubles, Phoebe continues to cope with her newfound power of empathy, and Leo gives Chris a new assignment.

After Piper vanquishes a demon from Wyatt's room, she has an epiphany about the rest of her life concerning Wyatt. Unable to handle's Piper's revelation, Paige and Phoebe decide to remind Piper of the importance of love by conjuring up a ""Mr. Right"" as Piper's birthday present. Meanwhile, Chris convinces the sisters to bind Wyatt's powers, then demonic cult members kidnap the baby.

The Charmed Ones help out Leo's mentor, Gideon, when he wants to find out who cast the spell of darkness over a magic school and conjured the headless horseman who has been beheading the teachers. Meanwhile, Phoebe goes on a vision quest.

When Phoebe frees a genie from a bottle, she soons finds that she must take the genie's place. Meanwhile, anxious to put Leo and Piper back together, Chris uses Phoebe to make his wish come true, but she takes his instructions too literally.

Gideon makes a deal with the Darklighters to get rid of Leo, but they accidentally send Leo and Piper to the Ghostly plane, leaving Phoebe and Paige to believe that they are both dead. Meanwhile, Chris begins to disappear and reveals that he must be conceived before the night is over or he will vanish forever.

Gideon creates a portal that puts Chris and Leo in a mirrored world where evil prevails, and Phoebe and Paige travel to the parallel universe to rescue them. Meanwhile, Piper gives birth to baby Chris.

When Paige and Phoebe summon Grams for Chris's wiccaning, Grams puts a spell on the children to try to end their sibling rivalry, but instead it reverts the sisters back to bickering teenagers. Meanwhile Phoebe, still acting like a teenager, attends an award ceremony with Les, and Leo consults a demonic seer to find out who is behind the attack on Wyatt.

A powerful sorceress switches bodies with Phoebe, who ends up trapped in the Underworld. Meanwhile, Paige faces a big problem when her new charge refuses her help.

When Piper goes for a job interview with a corporate recruiter, she's shocked to learn that the background check of her assumed identity was that of a woman wanted for murder. Meanwhile, Phoebe has a premonition of Dex being in an earthquake.

The Angel of Death returns to visit the Charmed Ones but they're shocked to learn that he's there for Leo. To try to stop him from taking Leo, Piper casts a spell that backfires, making every man a Leo lookalike, forcing Piper to take drastic measures and ask the Elders and the Avatars for help. Meanwhile, Billie continues her search for the truth behind her sister's disappearance.