Prudence, Agatha, and Dorcas, a trio of teenage witches better known as the Weird Sisters appear in the woods after hearing Sabrina Spellman summon a familiar. Having eavesdropped on Sabrina, they now know with certainty that she’s going through with her dark baptism and transferring to the Academy of Unseen Arts. However, as far as they’re concerned, Sabrina being the half-breed that she is, is not welcome. Prudence warns Sabrina to stay away from the Academy as she wouldn’t want what happened to her mother and father to happen to her. Dorcas and Agatha add that it would be tragic should the accident that took their lives also befalls Sabrina. The Weird Sisters then place a curse on Sabrina. Almost instantly, Sabrina’s nose starts to bleed.
After learning the names of the boys who harassed her friend, Susie, Sabrina went into the woods to summon the Weird Sisters and ask if they'll help her get revenge for Susie by helping her mess with four mortal boys. They surmise that Sabrina summoned them to remove the curse they had previously placed on her, but they would only do so if she pledged not to attend the Academy. Sabrina explains that the curse has already been reverse, but she was still willing to strike a deal. If they help her teach the boys a lesson, then she won't attend the Academy. Prudence, Dorcas, and Agatha agree. However, Sabrina strikes this deal with her fingers crossed behind her back.
That night, Sabrina (dressed in a similar fashion to the Weird Sisters), Prudence, Dorcas, and Agatha approach Carl, Billy, Ed, and Seth outside a convenience store. They were hoping the boys would join them for a party in the mines. While they recognized Sabrina from Baxter High, they asked where her friends attend, presumably Riverdale High School, but Prudence simply states that it's a special school. Sabrina, Prudence, Dorcas, and Agatha take the boys to the Greendale Mines, what some call "The Devil's Doorway." The mines run so deep that one shaft takes you down to hell. The girls lead the boys into the mines, though the boys start to regret their decision almost instantly.
Sabrina, Prudence, Dorcas, and Agatha undress, quickly followed by Carl, Billy, Ed, and Seth. The girls have cast an illusion spell on the boys to trick them into hooking up with themselves. The illusion fades once the flash from Sabrina's camera goes off. Sabrina tells them that the pictures will be posted all over school if they hit Susie or any girl ever again. When Billy becomes aggressive, Prudence takes charge. She cuts off the lights, and she and her sisters transform, taking on a ghoulish appearance, consisting of gray-green skin, glowing eyes, and black-rimmed teeth, causing the boys to run in fear. Salem watches from outside as the boys come rushing out.
Back inside the mines, Sabrina finds a steel cage with four birds inside sitting on the ground. Prudence, Dorcas, and Agatha took the boys' boyhood. Until Sabrina releases the birds, Seth, Ed, Billy, and Carl won't be rising to any occasion. Dorcas believes that a few weeks of impotence might teach them better manners. Prudence then states that Sabrina might be more suited for the Academy than they initially thought. They know Sabrina lied, but they helped her anyways because they enjoy tormenting mortal boys. Sabrina didn't want to leave with her friends still having to deal with the boys. Prudence questions why leave at all if she cares about her friends. Sabrina explains that with the visit from Father Blackwood, she wasn't sure she had a choice in the matter, which came as a surprise to the Weird Sisters. Prudence tells Sabrina that signing her name into the Book of the Beast is an even exchange. She gives up her freedom in exchange for power. However, Sabrina wants both.
Sabrina sprints through the woods in her mother’s white wedding dress. As she passes under the threshold, her once white dress magically turns black. Sabrina passes through the blue flames and arrives at her baptism, where Hilda, Zelda, Father Blackwood, Prudence, Dorcas, Agatha, and many others are in attendance. Hilda and Zelda present Sabrina for her unholy baptism. They disrobe her as part of the ceremony. Madam Satan watches from the shadows as Sabrina kneels. Father Blackwood smears blood over Sabrina forehead and read Sabrina her rights and demands her loyalty. However, when it comes time to sign the Dark Lord’s Book of the Beast with her blood, Sabrina backs out after realizing that she would have to give up her free will. She takes off running after seeing her parents, Edward and Diana, in the shadows, telling her to run. Father Blackwood orders the coven to get her.
Sabrina attempts to escape but she becomes entangled in magical possessed vines, though she manages to narrowly escape. Ambrose and Salem are sitting on the porch as Sabrina comes screaming for help, with the coven not far behind her. Father Blackwood demands Sabrina’s signature, but she refuses. She believes that there’s another path for her, similar to that of her mother and father’s. When Father Blackwood orders Prudence, Dorcas, and Agatha to take Sabrina, Ambrose informs them that a circle of protection rings the house, and no witch save for a Spellman may cross it. Any unwelcome witch that tries shall burn. With that, the coven retreats. Little did they know, Ambrose was bluffing. Zelda and Hilda brush right pass Sabrina and head inside.
The Weird Sisters attend Sabrina’s Trial. As she has been sued for breaking her promise, of signing the Book of the Best, Sabrina hired the mortal Daniel Webster as her lawyer. During the trial it’s revealed by Zelda, that Sabrina’s father Edward Spellman signed Sabrina’s Name in the Book of the Beast, when she was three days old. However Hilda reveals on the last day of the trial that Sabrina’s mother Diana Spellman baptized her in the Holy Mother Church of Greendale, much to the shock of the entire coven. After a short break Father Blackwood announces that due to conflicting contracts, baptism, and breeding, the Hellbound Court of Greendale decrees that Sabrina shall retain her mortal life on the condition that she also attend the Academy of Unseen Arts, as well as weekly Black Mass. Sabrina accepts the court’s decision. With a ruling in effect, the court restores full power to the Spellman family.
Dorcas, Agatha, and Prudence gather with the rest of the student body for the election for Top Boy. One warlock chosen to serve as a liaison between students and faculty. Nick is nominated. Sabrina offers to contest the election on the grounds that she had signed the Book of the Beast. She calls for all students regardless of their gender to have a voice. Nick nominates Sabrina and is seconded by Prudence. As part of the Top Boy selection, Father Blackwood announces that the candidates have to take part in three challenges at the Desecrated Church: the Inquisition, the Boil and Bubble, and the Conjuring. This will be followed by a vote.
As the the Inquisition commences at the Desecrated Church, the Weird Sisters telepathically wire the answer to Sabrina from the Academy's library, resulting in a victory for Sabrina. The Weird Sisters also attend the Conjuring test, during which time Sabrina and Nick accuse Father Blackwood or a member of the coven of sending high demons to attack her. And as proof, they summon the Plague Kings to get answers.
At the Desecrated Church, Dorcas rehearses with Nick and Zelda, while Sabrina watches. Watching the rehearsal, Sabrina whispers that Dorcas is a terrible actress, as the Dark Lord appears, telling her that the role should be hers. He suggests that she pulls a pin holding a rope with a sandbag hanging above Dorcas. Sabrina pulls the pin and the sandbag falls on Dorcas. It turns out that it was just an illusion; the pin is still in place. Sabrina starts repeating "I won't do it" out loud, with the others looking at her, asking who she is talking to. She answers that she was talking to no one and they all leave for lunch.
Dorcas, Agatha, and Prudence rush over to help to Sabrina after she chocked on a apple while rehearsing with Nick for the play. The following day at the Desecrated Church, Dorcas and Nick continue their rehearsal as Prudence and Agatha watch on. Zelda interrupts and tries to speak, but a frog pops out of her mouth, much to Prudence and Agatha's amusement. She holds the frog and asks the students which one of them did this to her. Prudence tells her that the frog is Sister Shirley Jackson's familiar. It's later revealed that Dorcas comes down with chickenpox and Sabrina replaces her in the play.
In celebration of the upcoming Lupercalia, witches' version of Valentine's Day, Dorcas, Agatha, Prudence, Sabrina, Nicholas, and Ambrose attend a party at Dorian's Gray Room.
At the Academy, Father Blackwood opens the Matching ceremony. Dorcas warns Sabrina that she intends to be paired up with Nick. Two years ago, it was Prudence and the year after that it was Agatha. Dorcas believes it to be her turn. As Top Boy, Ambrose organizes the participants. Ambrose tells the witches to pair up with the closest warlock when the music stops. The witches dance with long fabric around a pole. Sabrina tries to pair up with Nick, but Dorcas pushes her out of the way. However, Nick had bribed his friend Melvin into wearing a glamour, trapping Dorcas with Melvin. Sabrina and Nick are jubilant.
Later that night, Ambrose briefs the couples, that being himself and Prudence, Nick and Sabrina, Dorcas and Melvin, and Agatha and her date, about the Courting ceremony. He explains that they will go into the woods and disrobe and anoint themselves under the moonlight, absorbing the potency of Goddess Selene. Ambrose says abstinence is encouraged in anticipation for the powerful release that concludes Lupercalia, but he is not opposed to couples having sex. As Prudence passes out anointment baskets with items inside such oysters and figs, Father Blackwood warns the couples to stay on the path due to the dangerous creatures in the woods. The couples head into the wood.
As the girls prepare for the hunt, Agatha tells Prudence about her plans to have sex with Melvin, whom she believes to be a virgin. Dorcas reveals that she already had sec with Melvin during the night of the Courting. Prudence tells the Weird Sisters to prepare for the hunt. Sabrina says she is coming, but has to gather her berries of phylaxis. Later, Ambrose briefs the witches and warlocks about the Hunt. Nick, Melvin, and the other warlocks stand in a group to Ambrose's left, dressed as wolves, while Prudence, Agatha, Dorcas, Sabrina and the remaining witches, dressed in red hoods, stand to his right. As part of the Hunt, the witches chase the warlocks through the woods. The Hunt begins, and Dorcas intercepts Nick to have sex with him.
The Weird Sisters appear in Sabrina's vision. They flirt with Nick at the Academy, much to Sabrina's discomfort. Prudence asks Sabrina if they are taking part in the Academy's talent show. Nick explains that they hold a talent show each year to blow of some steam. He tells her that he is thinking of being a magician this year and asks if Sabrina would like to be the magician’s assistant. Prudence offers to lend her some fishnet stockings. Nick tells her to shut up, but Prudence responds that she was not the one who killed his familiar Amalia and didn't fulfill Lupercalia tradition by having sex.
The Weird Sisters attend the talent show hosted at the Desecrated Church. For Nick's first act, he picks Dorcas and Agatha as volunteers. Nick gets Agatha to lie in a box which is then sawed in half. When he opens the box, Agatha, to the horror of everyone, is sawed in half, with her guts spilling out. However, Nick and Dorcas soon reveal this was a trick and Agatha steps out of a large box.
For his third and final act, Nick calls for the bravest lady in the room. Sabrina volunteers for this trick. Nick asks her if she has experienced true weightlessness and tells her to trust him. Nick uses a magic trick to levitate Sabrina into the air. However, he struggles to control his powers due to the Weird Sisters' interference.
Dorcas and Agatha also appears briefly in Zelda's vision with Ambrose. She asks them about the whereabouts of Father Blackwood, but they don't know. 
The Weird Sisters enter Father Blackwood's bedroom as he's shaving. His body covered with ritualistic tattoos. They shared a dream. Prudence, Agatha, and Dorcas informs him that with the Anti-Pope's visit and Father Blackwood's marriage to Zelda, she feared delaying it. The Weird Sisters hold hands and tell him that they saw an altar, a coffin and much bloodshed. They warn him to beware of the Spellmans, claiming they will be the undoing of the Blackwoods. Blackwood dismisses their warning and claims that the Spellmans are at his mercy. He orders them to go to bed and dream no more of blood. Agatha and Dorcas take leave, but Prudence stays behind and asks if Zelda will take his name. Blackwood confirms this is the case. When Prudence asks if Sabrina will be a Blackwood, Father Blackwood accidentally cuts himself with his razor blade. Father Blackwood vows that Sabrina will never be a Blackwood before sending Prudence to bed.
The entire Academy gathers to welcome the Anti-Pope. As he is guided into the dormitory by Father Blackwood and Zelda. Father Blackwood then introduces Nick to the Anti-Pope. When Prudence asks her father if he is going to introduce her and the Weird Sisters, Father Blackwood introduces her as Prudence Night, describing her as one of the "gutter orphans" the Academy fosters, along with Dorcas and Agatha.
That night, Dorcas discovers the Anti-Pope has been murdered and screams, alarming the Academy. Father Blackwood, Zelda, and Prudence enter Enoch of Antioch's chambers to find that he has been hacked to death. Blackwood strikes down two of the Judas Society stalwarts guarding him. Despite Zelda and Hilda's pleas, he tries to strike down Ambrose who manages to teleport to safety. He orders the others to find the traitor.
Ambrose is working out in his cell when Dorcas enters with his gruel rations. Ambrose requests something more succulent and rubs his body against Dorcas. Prudence tells Ambrose to get away from her sister, shoving Dorcas to the ground and her to drop the tray of gruel. She chides Dorcas for her infatuation with Ambrose. Ambrose tries to flirt with Prudence, but she denounces him as a traitor and tells him that he will rot in this cell until he provides a confession. Ambrose says he has spent 75 years under house arrest and that it will take more to break him. Prudence allows the Infernal Bailiff to rough Ambrose up.
Prudence denies Hilda access to the Academy as she wishes to bring a plump chicken for Ambrose. However, Hilda offers the chicken to Prudence and the Weird Sisters in exchange for allowing her to visit Ambrose. Prudence allows Hilda to spend time with "Ambrose",who in actuality to Agatha in glamour. Prudence then leads "Hilda", who is actually Dorcas, into Ambrose's cell in hopes of getting Ambrose to confess to killing the Anti-Pope. However, both Ambrose and Hilda see past their tricks.
The Weird Sisters have gathered the students in the lobby. With their help, Dorcas, Agatha, and Prudence tell the students that tonight they are collecting their energies to enact a spell of compulsion. She enlists their help on forcing Ambrose to confess to the murder of the Anti-Pope. The witches and warlocks begin chanting in unison. Ambrose escapes his cell and warns the Academy that the witch-hunters have come. Prudence orders the other witches and warlocks to hide while she and the Weird Sisters face the intruders. Jerathmiel and Mehitable enter the lobby and demand that the witches and warlocks come out of hiding.
Dorcas, Agatha, and Prudence emerge from hiding and use magic to force the two witch-hunters to their knees. She tells Jerathmiel that the pain in his head is his brain atomizing into sand and Mehitable that the pain in her chest are her lungs hardening. The Weird Sisters tell the witch-hunters that they are no ordinary witches but they are the daughters of the Church of Night, the "Three-In-One." However, Mehitable and Jerathmiel call upon the heavenly choir of the Nine Principalities to give them victory over the witches, causing the Weird Sisters to bleed from their eyes and ears. Mehitable and Jerathmiel tell them that they are no ordinary witch-hunters, but they are angels.
The Weird Sisters, along with the rest of the witches and warlocks are taken captive by the witch-hunters and locked up in the desecrated church. Dorcas, Agatha, and Prudence are tied up and are to be burned at the stake. He tells them that God will forgive their sins if they vow to accept Him as their Savior. He adds that their bodies will be consumed and purified by the fire of righteousness. When Elspeth refuses to denounce the Dark Lord, Jerathmiel slits her throat. Sabrina arrives and he shoots her down with arrows. Presumably killing her. Prudence, Agatha, and Dorcas are distraught. He then turns his attention to Melvin and kills him. Jerathmiel is about to burn the Weird Sisters when Sabrina suddenly awakens and starts to levitate. She demands that the witch-hunters convert to Lucifer's faith. Sabrina summons fire with her hands and forces Jerathmiel and Mehitable to their knees. After Jerathmiel and Mehitable have uttered the prayer, Sabrina burns them alive.
Following the destruction of the angelic witch-hunters, the witches and warlocks return to the Academy. Harvey carries an unconscious Sabrina back to the Academy of Unseen Arts. He is followed by the Weird Sisters, Elspeth, Melvin, and the remaining liberated students. Sabrina awakens, pulls the arrow out her chest, and miraculously heals Ambrose.
The Weird Sisters enter the cafeteria and mocks Sabrina as she preaches her father's teachings and philosophies. Prudence says that mortals hate and fear witches and is astounded that Sabrina expects witches to be with them. Sabrina counters that her father married a mortal. Prudence disagrees. Knowing that she is unable to convince Prudence and the Weird Sisters with her words, Sabrina uses her powers to cause rose petals to fall. Prudence is frightened and asks Sabrina how she is doing this.
The following day at the desecrated church, the Church of Night have gathered for the execution of Ambrose. The Weird Sisters are in attendance. Due to the lack of new evidence, Methuselah orders that Ambrose's execution to proceed as planned. The Infernal Bailiff drags Ambrose before the guillotine and places his head in the block. The executioner lowers the blade but is instead beheaded by a killing spell. Before long, the Dark Lord appears. Lucifer chastises him for degrading the coven with his pettiness and orders Ambrose spared before disappearing. Methuselah declares that Ambrose is reprieved and orders his release.
Dorcas and Agatha later attend a party for witches and mortals at Sabrina's house, where she intended to show the mortals what she is capable of.
Father Blackwood addresses the Academy of Unseen Arts regarding the the Witches' Council turning its back on them. Father Blackwood is willing to shield them and to guide them back to the old ways. The Judas Society unveils a statue of himself and renames the Church of Night to the "Church of Judas". He commands them to look to the Five Facets of Judas for salvation and exaltation.
At the Academy of Unseen Arts, Prudence approaches Dorcas and Agatha for their help. They reject being called sisters, seeing as they don't share the Blackwood name. When Prudence reveals to them of her plan to kill Faustus Blackwood, she gains their attention. How they will do it since he won’t let them get close, they ask. Prudence replies that they won't need to and shows a red ribbon. The Weird Sisters sing and dance around a statue of Father Blackwood while holding the red cloth in a triangle. Blackwood leaves his office and finds the Weird Sisters in the lobby. He tells Prudence that the Dark Lord has summoned him and that she must attend.
The coven gathers at the desecrated church. Father Blackwood gives an embellished account of his meeting with the Dark Lord and claims that the Dark Lord proclaimed his Church of Judas as the one true Church of Darkness. The coven hails Satan and tells the coven to take part in an Unholy Communion. The witches and warlocks step forward to drink the wine. Agatha and Dorcas reluctantly obey orders to step forward as Blackwood shouts Hail Satan.
Prudence later arrives at the Desecrated Church to find Dorcas and Agatha choking on poison. As it turns out, after being reprimanded by the Dark Lord, Father Blackwood had plans to kill the coven and leave town. Prudence teleports herself and the other Weird Sisters to the Spellman household. Prudence begs Zelda, Hilda, and Ambrose to help her Sisters and reveals that Blackwood poisoned the entire Coven. She tells Zelda that they are still alive and are at the Desecrated Church. While Hilda and Prudence attend to the Weird Sisters, Zelda and Ambrose teleport themselves to the Desecrated Church. Afterward, Prudence thanks the Spellmans for saving her Sisters' lives.
Dorcas has red hair, blue eyes, and pale skin. Like her sisters, she wears old fashioned clothes with lace collars and black tights. She also wears her hair in a milkmaid braid. Underneath her human appearance, Dorcas has a more ghoulish appearance, consisting of gray skin, glowing red eyes and black rimmed teeth.
Dorcas is an ambitious and impulsive witch. She is a devout member of the Church of Night, who along with her sisters Prudence and Agatha, torments Sabrina Spellman for her dual nature. Dorcas can be quite cruel, much like her sisters, but she is also more reluctant to do such horrendous acts as murder. Although initially appearing as a willing participant, Dorcas later revealed that she was pressured by Agatha into killing Tommy Kinkle by bringing down the Greendale mines. Agatha's only regret being that Harvey survived while Dorcas, in reality, didn’t want to do it.
Powers and Abilities
Spell Casting: The power to change and control events through the use of incantations, commands and gestures.
Cursing: The power to put a curse on someone or something, causing them to phase incredible bad events, luck and/or harm.
Illusion Manipulation: The power to project highly realistic illusions into the physical world.
Necromancy: The power to control, manipulate and resurrect the dead.
Teleportation: The power to teleport from one location to another without occupying the space in between.
Mind Control: The power to make a person unable to deduce what is real and what is suggestion. Dorcas shares this gift with her sisters.
Telekinesis: The power to move things with the power of the mind.
Poppet Puppetry: The power to control non-sentient beings and physical events through the use of poppets. Dorcas used a poppet to bury Harvey Kinkle and Tommy Kinkle in the mines.
Telepathy: The power to read the minds of others and project one's thoughts into others' minds. Dorcas shares this gift with her sisters.
Precognition: The power to receive visions of the future through dreams. Dorcas shares this gift with her sisters.
Longevity: While not apparent due to young age, Dorcas ages at a slower rate than mortals.
Dorcas, Prudence and Agatha share a close bond, with Prudence acting as the leader of the trio. They grew up together as orphans in the Church of Night. The sisters look down on and bully Sabrina Spellman for her dual nature of being half-mortal. And should Dorcas and/or Agatha step out of line or act without first gaining Prudence's permission, she will have no qualms about punishing them, as seen when Dorcas and Agatha murdered Tommy Kinkle in the Greendale Mines with a remote killing spell.
Dorcas adores seances, as she expressed her joy in being invited by Sabrina in performing one.
Dorcas is an abysmal actress.
Dorcas is an ancient and respectable witch name.
When Dorcas was younger she wasn’t very confident, and stammered when she got nervous.
In the Chilling Adventures of Sabrina comic series, the Weird Sisters are a trio of witches who can foretell the future. They predicted that if humans and witches didn't inter-mix that it would lead to the extinction of witchery.
A far cry from their counterparts who despise Sabrina for her mixed heritage alone.