And Lydia's birthday is always the party of the year, isn't it? Derek: Isaac! Derek: Yeah. I promise everything's going to get back to normal, Lydia. Isaac: So how come she gets to wear the headband? It's Isaac's dad. Matt: Not really. Peter: I heard there was a party. Sheriff: And they're working on a warrant to arrest him for the murders. Stiles: Dad, the coach. That's - is that it? Victoria: She'll hear things. You know, the fact that all the victims were on the swim team, the way the kanima reacted around the pool.
Plan: A: Stiles; Q: Who realizes that all the murder victims were on the Beacon Hills High swim team? A: Isaac's father; Q: Who was the coach of the Beacon Hills High swim team? A: Lydia's birthday party; Q: At what party does Lydia spike the punchbowl with wolfsbane petals? A: Lydia; Q: Who spikes the punchbowl with wolfsbane petals? A: the Hale house; Q: Where does Lydia bring Derek to? A: Peter; Q: Who uses Derek's blood to come back to life? A: Victoria; Q: Who kills herself so that she would not become a werewolf? A: the Kanima's master; Q: What is Matt's role in the Kanima's plot? Summary: Stiles realizes that all the murder victims were on the Beacon Hills High swim team and the coach at the time was Isaac's father. At Lydia's birthday party, Lydia spikes the punchbowl with wolfsbane petals, causing all the party attendees to hallucinate the things they fear most. She attacks Derek and brings him to the Hale house, where Peter uses Derek's blood to come back to life. Victoria kills herself so that she would not become a werewolf. It is revealed that Matt is the Kanima's master.