Phoebe Halliwell returns to San Francisco after losing her job to live with her older sisters, Prue and Piper. During their first night together in their grandmother's house, Phoebe finds a book of witch craft and recites an incantation that leaves the sisters three with powers they were destined to have. As they begin discovering their new abilities, a warlock that has been killing local witches, targets the sisters.

Trudeau and Morris investigate the abduction of young women. Meanwhile, Prue regrets sleeping with Andy on their first date and later interviews for a new job. Phoebe catches the eye of a photographer who is interested in doing more than just taking pictures to capture her beauty. Piper faces a personal crisis when she fears her powers may have come from an evil source.

The sisters' father drops in for a surprise visit after a twenty year absence. When their house is broken into with the Book of Shadows the target, Prue believes her father is responsible, but it turns out the new neighbors are instead.

When a young man is killed in cold blood and rises as a ghost, he seeks Piper's help to get his body buried properly before his soul is claimed by a Chinese demigod and cast into hell. With Prue's birthday coming up, Phoebe takes a job as a hotel bar psychic to buy Prue a gift and saves a man's life. Prue learns that Andy was once married and isn't thrilled about it.

A sleep researcher enters the dreams of women with murderous intentions and targets Prue as his next victim. Phoebe and Piper cast a spell to find the love their missing in their lives, but things don't turn out the way they thought.

A wealthy woman plans a wedding for her son, but a demon appears to take the place of the bride. Piper is left to cater the wedding after her former boss left for France and enlists Phoebe's help. Phoebe believes that Piper may be pregnant with Jeremy's child. A priest is murdered before the wedding after trying to kill the demon-bride, and Andy seeks Prue's help in identifying a weapon at the crime scene. When the sisters learn the truth about the demon-bride, they decide to help the old bride get her future husband back.

Aviva, a young girl is used by an evil sorceress that wants to steal the sisters' powers. Piper and Phoebe compete for the attention of Leo, their handyman. Andy gets fed up with Prue after she cancels numerous romantic encounters and doesn't offer any explanation why.

Phoebe has a vision that a warlock from the future will kill a young woman and attempts to prevent it. Prue casts a truth spell to find out how Andy would feel if he knew she was a witch but the spell effects Piper and Phoebe also. Piper learns how Leo feels about her and why her boss is over working her.

In the 17th century the sisters' ancestor Melinda Warren, curses a warlock to spend an eternity in a locket after stealing her powers and betraying her love. Three hundred years later Prue accidently frees the warlock who is determined to destroy the sisters and take their powers. The Halliwell's, unsure what to do, summon Melinda to imprison him again.

Rex tries to frame Prue for stealing a tiara by manipulating the sisters--and the police--with a process in which he implants subliminal thoughts in their heads. Meanwhile, an unsuspecting Phoebe enjoys the attention Rex gives her.

Phoebe's former beau arrives, hoping to reconcile; Prue tries to save the auction house from bankruptcy; Piper's use of witchcraft for matchmaking goes awry.

Piper is attacked in the park when she has a flat tire and learns she is the sole survivor of a beast that tears out the hearts of its victims. Unfortunately, the Halliwell sisters learn that anyone who is attacked and survives the attack of the Wendigo, becomes one.

The Halliwells' 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 a new job.

When a boy who has powers is kidnapped by two thugs who plan to use him in a robbery, the sisters get a message that he needs help. But they don't know who or where he is. Meanwhile, Leo returns for a visit and accidentally reveals his true identity to Phoebe.

After an earthquake, the sisters call a repair man who accidentally releases a shadowy demon in the basement of the Halliwell house. As the demon seeks to gain of control of the house, Phoebe comes under the control of the demon, who wants her to kill her sisters. After Piper is unable to complete her preparations for a dinner party Prue is having for clients of the auction house, they learn that Phoebe's childhood fear of the Woogyman is real and try to regain control of the house.

Prue becomes the target of Gabriel, one of the Lords of War, who must steal the magic of a first born witch in order to regain his powers. When the sisters learn Gabriel is immune to normal weapons and they don't currently have the strength to defeat him as their ancestor did, Phoebe suggests Prue cast a spell to multiply her strength. The spell however creates two clones of Prue to help battle Gabriel.

The Halliwells encounter a warlock that has been waiting for years to get their powers. The warlock is immune to the powers of the Charmed Ones after making a deal with their mother to spare her life in the past. In order to save themselves, the girls cast a spell which returns them to mid-70s when the deal was made, their grandmother and mother are still alive, Prue and Piper are playful little witches and Phoebe is still unborn and in the womb.

Prue befriends a soon-to-be priest, but discovers that he has a dark past: a history of warlocks runs through his family, and his two older brothers are trying to force him to join them in their tradition of evil. Phoebe tries to help Piper make a love connection.

A demon steals innocent children in order to use their sight to spot forces of good; a reporter sees Prue use her powers. Phoebe seeks the aide of a former child victim and Andy finally learns the sister's secret.

Piper worries about leaving Prue and Phoebe alone as she leaves on a business trip to Hawaii. Phoebe, while touring Alcatraz, watches the ghost of killer take possession of a guard's body to escape the island. Once free the ghost targets those that played a part in his conviction to seek revenge. The sisters discover the only way to banish the ghost is for one of them to die and recite a spell while on the astral plane.

The sisters' vacation is cancelled when Leo appears in the Halliwells house the victim of a Dark Lighter's lethal poison tipped-arrow. Leo is seeking the sisters help to protect a girl that is being targeted by the Dark Lighter. To try to save Leo from dying, Piper casts a spell that will switch her powers with his. Unfortunately the spell also causes Prue and Phoebe's powers to swap. Andy quits his job to help protect Prue's secret from being exposed by an Internal Affairs investigation.

Episode 22: "Deja Vu All Over Again"

As a warlock makes plans for his attempt to kill the Charmed Ones, he receives a visit from Tempus, a demon who will turn back time until the warlock succeeds in killing all the Halliwells. Upon turning back time after the first failed attempt, Tempus informs the warlock only he will remember the previous events. Fortunately for the Halliwells, Phoebe's power enables her to sense the time loop as deja vu. But unfortunately for Andy, she sees his death at the hand of a warlock in a premonition.