We flash back to the '80s, where young Ruth is giving birth to her son ... Aleister!
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Ruth is next in line to be coven leader, and having a male child jeopardizes that. Ruth blackmails Clara Sullivan, whom she knows sells a spell or two on the side, to take care of the problem. Clara prepares to drown baby Aleister ...
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... but she can't bring herself to do it, so she leaves him at the door of a church. Soon, he'll be adopted by the Ashmonts and grow up to be the big bad of Bitten Season 2.
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Back at the compound in the present day, Rachel tells Logan that she knows he's a werewolf ... and demands to know what she's pregnant with. Logan tells her their baby will have plenty of "normal" years ... and then he'll become like his father. Rachel tells Logan to walk away from her once they get out of this mess.
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Aleister is trying to teach Savannah how to work her magic without a talisman, though she's distracted by worrying about Elena. This annoys Aleister ...
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... so he puts a spell on Elena, one he believes will finally break her.
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Logan's attempts to bust him and Rachel out of their cell releases a deadly gas. Sigh.
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Elena's starting to feel a bit ... strange. She manages to crawl through the hole in the wall of her cell, which puts her in Savannah's room.
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Pulling an investigating goon through the wall and putting him out of his goonish misery allows her to obtain a set of keys.
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Out in the hallway, things get stranger ... and more sinister. Elena feels groping hands all over her, which then pin her to the wall.
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Clay and Paige journey through the woods, trying to pick up Elena's scent ... or, in Paige's case, her vibe. It ain't easy, though.
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Aleister's spell is really messing with Elena's mind. Now she's hallucinating that Clay is there, comforting her ...
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... and now she's drowing in a tub of blood. Bad trip, bad trip!
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Logan uses the wire in Rachel's bra to hotwire the controls of the cell door. It works - the cell door opens, and they escape the deadly gas. Smart thinking, Logan! And nice rack, Rachel!
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Aleister gives Savannah a gorgeous red dress. "Today is the day of The Undoing," he tells her. Ick.
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Elena's latest hallucination is kind of a Silent Hill version of Diane, crawling around on the floor and blaming Elena for Philip's death ... and her own. Guilt, guilt, guilt!
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A skirmish with what seem like real goons gains Elena not one but two baseball bats.
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Paige and Clay are having a hard time tracking down Elena, but after Paige shares a moving tale from her romantic past, they vow to leave no stone unturned. Love will see it through, baby.
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Elena runs into Savannah, who reveals to her the shocking "truth" ...
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... Elena is actually still in her cell, writhing in mental anguish as Aleister's spell tears her mind apart.
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Savannah goes all dark, accusing Elena of being selfish and not protecting her when she promised she would. More guilt, guilt, guilt!
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Dream Clay gives her the strength she needs to fight Aleister's magic ... and tells her that she needs to get outside and give him a sign to find her.
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Outside, Aleister and Savannah have commenced with the ritual of The Undoing.
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Aleister prepares to inject Savannah with Elena's blood, which will then kill all witches everywhere ...
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Luckily, Elena shows up, demanding that Aleister give her Savannah and blowing some stuff up for effect. Clay and Paige should have no trouble finding her now!
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Logan and Rachel help out by stopping the spinning top, which makes everyone's neck marks disappear.
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Elena tracks Aleister and Savannah to Aleister's quarters. Aleister has had enough of Elena's meddling and sends shards of mirror glass flying towards her ... which are luckily deflected by a counter-spell conjured by Paige, who shields Elena with her body.
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Aleister reveals himself as Paige's brother. Enraged, Paige works a spell that makes her dear sibling disappear from the room ...
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... and re-appear in another part of the compound, impaled through a post. Aleister is dead!
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The goons are no longer under Aleister's control. Paige and Nick prepare to help the confused legions that have no idea where they are or how they got there.
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Elena and Clay are reunited. They leave the compound with Savannah ... though Logan and Rachel are nowhere to be found.
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Ha, Aleister's not really dead -- it was a trick! He watches as Clay, Elena and Savannah drive off, contemplating his next evil move.
