Charmed (season 3)

While Piper and Leo are away for a month seeing The Elders, Prue and Phoebe must face a series of demons known as Guardians, who help mortal murderers go free in exchange for the souls of their victims. After saving Darryl from a Guardian, Prue and Phoebe must testify in court, where it is later revealed that the judge and all the other people in the court room are demons. Phoebe falls in love with the District Attorney Cole Turner (Julian McMahon), however she does not know he is a demon sent by The Triad to kill the Charmed Ones. Meanwhile, Piper and Leo return and reveal that The Elders want them to end their relationship or else the sisters will get a new Whitelighter. However, Leo decides to propose to Piper in secret.

On Halloween, a local coven leader from the 1600s named Eva (Clare Carey), summons the sisters back in time to save a witch named Charlotte (Sadie Stratton) and her soon-to-be born child from an evil witch named Ruth Cobb (Judy Geeson), who wants to raise the child evil. It is later revealed that the child in the womb is the sisters' ancestor Melinda Warren and Cole travels back in time to capture her at birth. Meanwhile, back in the present time, Leo and Darryl try to fight off two Grimlocks who were vanquished by the Charmed Ones once before, but were brought back by the power of Halloween.

Prue becomes obsessed with learning more about The Triad, and thinks that they are launching an attack when the manor is burglarized with her personal items missing. Piper cannot concentrate whenever she is with Leo in a romantic setting because she fears that The Elders are always watching them. Meanwhile, Cole discovers that a demon named Troxa is trying to kill the sisters.

Unwittingly following the signs laid out by Cole, Prue comes into contact with a seemingly innocent shut-in, Vinceres, who refuses to leave his apartment that is about to be demolished. The man is faced with unendurable pain caused by his ability of feeling all of the emotions of the city. After learning the man is an Empath, she casts a spell to relieve him of his power, but it is transferred to her. Prue is later told he is a demon given this power to serve as a curse, causing him the inability to prey on witches or innocents. She nearly goes insane from bearing this gift that she was not meant to have. But Prue eventually overcomes it, intensifying the pain Vinceres felt by finally astral-projecting into his body and destroying him.

In an attempt to destroy the Charmed Ones, Cole enlists the help of Andras, a demon who magnifies anger into rage. Meanwhile, when the sisters lose their magic after using their powers against each other, they are left defenseless against attacks from The Triad and Belthazor.

The sisters must stop a warlock from executing his plan to steal specific powers from witches in his attempt to kill every Whitelighter in the world.

A demon named Lucas wielding the Seven Deadly Sins uses his powers against The Charmed Ones. Phoebe becomes infected with lust, Prue with pride), Piper with gluttony, and Leo with sloth. It is revealed that those infected with one of the sins may self-destruct due to the nature of the infection.