A warlock repeatedly attempts to kill the Charmed Ones, with a help from demon Tempus turning back time after each failure so that he can try again. However, because of the endless time loop and her power of premonition, Phoebe experiences a number of strong cases of déjà vu and is able to figure out that there are evil forces after them.
The sisters are about to go on a relaxing weekend getaway to Cabo, when a mortally wounded Leo shows up and asks for their help to save a young woman who's being chased by a darklighter. Desperate to save Leo, Piper casts a spell that swaps their powers, however in doing so, she accidentally swaps the powers of Prue and Phoebe as well. Meanwhile, pressed by an Internal Affairs investigation Andy decides to leave his job in order to protect Prue's secret from being exposed.
After Piper leaves on a business trip, it doesn't take long for some friction to appear between Prue and Phoebe. However, they set their differences aside when they run into a ghost of a serial killer who's looking for a revenge against people who sentenced him with a death penalty. Meanwhile, the many unsolved crime cases are finally starting to catch up with Andy when people from Internal Affairs take an interest in them.
When Prue witnesses and tries to stop a kidnapping of a young boy in the park, a reporter sees her using her powers. He tries to blackmail her to get a sensational story for his newspaper. Phoebe and Piper attempt to learn more about the demons who stole the child and come across a similar kidnapping that happened 20 years ago. Meanwhile, Andy gets involved in the kidnapping case and finally confirms his suspicions about Prue's powers.
Prue attempts to help a young man, who desires to become a priest in order to avoid fulfilling his destiny as a warlock of the Evil Charmed Ones. Meanwhile, Phoebe tries to get Piper to stop shying away from a date with Josh.
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.
When Phoebe has a premonition of Prue being stabbed to death, it coincides with a warrior coming to town in order to kill the eldest sibling witch as he did to the sisters' great-great-great-aunt.
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.
Prue helps a young witch who has been kidnapped, and renews her own faith in having children. Meanwhile, Phoebe finds out that Leo is hiding an important secret that threatens his relationship with Piper.
The sisters' mother warns them about a demon from the underworld who comes around every 1300 years on Friday the 13th to literally scare witches to death and feed on their fear. Meanwhile, Phoebe has misgivings about her expected duties at her new job and Piper is frustrated by her superstition about relationships started on Friday the 13th.
When Piper is attacked by a vicious beast, Andy goes on a stakeout with an FBI agent who is hunting the creature. Meanwhile, Prue hires Phoebe to work at the auction house, but Phoebe's vision of a terrible car crash immediately sends her off on a mission to find a long-lost child.
When Phoebe's ex-boyfriend comes to town he brings trouble in the form of a stolen Egyptian urn which carries a mortal curse. Meanwhile, Prue tries to save the auction house from bankruptcy, and Piper's witchcraft backfires.
When Prue is framed for stealing from the auction house and arrested, it is revealed that her boss, Rex, is a warlock. It's up to Piper and Phoebe to prove Prue's innocence and vanquish Rex before its too late.
A warlock from the past is released from his curse and tries to steal the sisters' powers with the help of Rex and Hannah, but the sisters resurrect their ancestor to combat him. Meanwhile, Piper works up her courage to ask Leo out and Andy gets frustrated by Prue's continued involvement with bizarre police investigations.
Acting on Phoebe's premonitions, the sisters race to stop a mysterious killer from striking again. Meanwhile, Prue finds a truth spell and uses it to find out what Andy's reaction to her being a witch would be.
A troubled teenage girl befriends Phoebe with the hopes of joining the Halliwells, but she's been lured to the dark powers of witchcraft by a sorceress. Meanwhile, Prue tries to find some alone time with Andy and Phoebe and Piper vie for the attention of Leo.
The sisters must face Hecate, a powerful demon goddess, who is preying upon a woman, her son & his fiancee, and attempting to conceive a full demon child.
Prue finds her sleep disturbed by strange visions in which she's taunted by a man. Meanwhile Phoebe and Piper cast a spell to attract men, but it turns out too strong, and they can barely escape their myriad of admirers.
Piper falls for the ghost of a recently murdered man who needs her help. Meanwhile, Phoebe works as a psychic to help others and make money for Prue's birthday present, and Prue discovers a devastating betrayal.
The sisters' father returns after a 20 year absence, and the new neighbors aren't what they seem.
Piper has trouble dealing with her powers and fears what might happen if she enters a church. Meanwhile, Phoebe meets a photographer who sucks the life out of young women to keep himself young, and Prue faces relationship complications with Andy when she gets a job at an auction house.
Three sisters reunite after the death of their beloved grandmother, and learn they have inherited much more than the family manor.
