Phoebe's fear of the Woogyman amuses Prue and Piper, until an earthquake releases a shadow demon. Phoebe under the control of the Woogyman tries to kill Prue and Piper, who must find a way to rescue Phoebe and get rid of the Woogyman.

A powerful warlock shows up claiming that he made a pact with the sisters' mother in which he spared her life in exchange for the girls' powers. Fleeing him, the three sisters go back in time to the 1970s when their mother was still alive and they try to prevent the pact.

On their first anniversary of becoming witches, the sisters face a cloven-hoofed demon called Abraxas, that steals the Book of Shadows and undoes the spells they've cast.

The sisters must find a way to break a curse which turns a man into an Owl by day and his girlfriend into a Wolf by night. Meanwhile, Prue discovers a way to hold Piper and Leo's wedding without 'The Powers That Be' finding out.

On the day of Piper's marriage to Leo, Prue's Astrally Projected-self adopts an uninhibited, wild personality that threatens to ruin the wedding and place Prue in jail for Murder.

While the sisters must deal with the possibility of being separated as the newlyweds plan to move out on their own, they recall a time before they knew they were the Charmed Ones, when the girls were coming to grips with the death of Grams and Phoebe's departure to New York.

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.

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.

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 Grams comes to the manor for a Wiccan birthing ceremony, for Wyatt, the sisters find out that she has brought a memory from her past, a former lover who wants to kill the Charmed Ones and bring back the love they once shared. Meanwhile, Phoebe contemplates Jason's invitation, even though it will take her away from her family, and Paige casts a truth spell to figure out if Nate can accept her being a witch.

Paige finds herself transported back in time to an era of free love and free magic, where she discovers Grams, a peace-loving hippie, who is on a crusade to rid the world of evil through the magical power of love.

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.

After being presumed dead, the Halliwell sisters begin their demon-free existence with new identities: Phoebe is overwhelmed with visions of her future husband; Paige begins hearing her whitelighter call, which draws her to a mysterious young witch; Piper attempts to deal with her financial situation, the club and her children. Meanwhile, a brash young demon decides that he wants the Halliwell manor as a trophy and plots to kill Victor to get to it.

Piper & Leo, with help from Coop's ring, must travel back in time to change the events that lead to the deaths of Piper's sisters. Meanwhile, Billie uses her power of Projection to do the same thing; many familiar faces gather to help Piper in her time of need.