And because you know how to catch Boyd and Cora without killing them. But Boyd and Cora are hunting for the pleasure of the kill, for some primal apex predatory satisfaction that comes from the ripping of warm bodies to bloody shreds. Derek: There's a teacher. Derek: Wanna help? He was hit in the back of the head, hard enough to kill him. Her name is Heather. I mean, they were out in the woods and...
Stiles: nobody's found her yet? Is someone there? Isaac: What about the boiler room? It's Erica. Lydia: I'm supposed to call you first when I find a dead body? Melissa: Two girls. Scott: Derek, they killed someone. Scott: Trying to. Stiles: Sacrifices. Stiles: There's a dead body.
Plan: A: Allison; Q: Who does Scott tell that his mother tried to kill him? A: Erica; Q: Whose body does Derek discover? A: Argent's help; Q: Who do Derek, Isaac, and Scott seek to capture Boyd and Cora? A: Lydia; Q: Who finds a dead boy and calls Stiles for help? A: the high school's boiler room; Q: Where do the guys trap Boyd and Cora? A: Jennifer; Q: Who is the teacher that Derek saves from Boyd and Cora? A: the morgue; Q: Where does Stiles find Heather's body? A: the same way; Q: How was Heather killed? A: both virgins; Q: What was the commonality between Heather and the boy who was killed? A: sacrifices; Q: What does Stiles think someone is using Heather and the boy as? A: Sheriff Stilinski; Q: Who discovers a third virgin girl? Summary: Scott reveals to Allison that her mother tried to kill him. Derek discovers Erica's body. Derek, Isaac, and Scott seek Argent's help to capture Boyd and Cora before they kill someone. Lydia finds a dead boy and calls Stiles for help. The guys trap Boyd and Cora in the high school's boiler room but realize a teacher, Jennifer, is inside; Derek saves her. Stiles comes face to face with Heather's body in the morgue, killed the same way the boy was. As the two were both virgins, Stiles concludes that someone is murdering them as sacrifices, just as Sheriff Stilinski discovers a third dead girl, killed the same way.