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"So Boyd and Cora might not have killed anyone?"
"You're gonna wish they did."
"Why?"
"I'm not exactly sue yet. The other girl who was out in the woods, Emily? They're gonna find her. She's one of them. Emily, Heather, that guy Lydia found at the pool? They're all virgins, and they're all gonna have the same three injuries-- strangled, throat slashed, head bashed in. It's called the three-fold death."
"So if these aren't random killings, then what are they?"
"Sacrifices. Human sacrifices."
Scott McCall and Stiles Stilinski about the murders


Fireflies is the third episode of Season 3 and the twenty-seventh episode of Teen Wolf.

Synopsis Edit

With Boyd and Cora on the loose and under the influence of the full moon, Scott and Derek must turn to an unlikely ally.

Plot Edit

Scott finally confesses to Allison that her mother tried to kill him in Raving, while Derek discovers Erica's body in the supply closet of the bank. Derek, Isaac, and Scott seek help from Chris to capture Boyd and Cora before they kill someone. Lydia goes into a trance and inadvertently finds the body of a dead lifeguard at the swimming pool before calling Stiles for help. Scott, Derek, Isaac, and Chris (and with help from Allison, unbeknownst to all but Isaac) trap Boyd and Cora in the high school's boiler room before they discover that Jennifer Blake was inside as well.

After luring the rabid Boyd and Cora away from her until sunrise, when they promptly fell unconscious, Derek went to help Jennifer out of her hiding spot. After spending time helping Melissa McCall at the hospital, Stiles discovers Heather's body had been brought to the morgue with the same fatal injuries that the lifeguard Lydia found killed (head beaten in and strangled before their throat was slit, otherwise known as the "three-fold death" in ancient Celtic tradition). After realizing that Heather and the lifeguard were both virgins, Stiles concludes that someone is murdering them to offer as human sacrifices, just as Sheriff Stilinski discovers a third dead girl, Emily, killed in the same way.

Cast Edit

Main Cast Edit

Supporting Cast Edit

Guest Cast Edit

Continuity Edit

  • This episode marks the first episode where Chris and Allison Argent return to the Hunter life since the events of Master Plan, though neither tells the other about it.
  • Argent and Scott see glowing fireflies in the nature preserve, and Argent remarks that California fireflies are not bioluminescent and therefore shouldn't be glowing. The presence of these fireflies will have a significant role in the supernatural mythology of the entire season.
  • Scott finally confesses to Allison that her mother Victoria tried to kill him in Raving. He cites the fact that Victoria died in Party Guessed as his reason why he kept it a secret, as he didn't want Allison's last memory of her mother to be of a murderer.
  • This episode marks the introduction of the Argents' ultrasonic emitters, a device that will also feature prominently throughout the series.
  • Derek confirms that he hasn't seen his sister Cora since the fire, and that he was under the impression that she had died that night until they were reunited in Chaos Rising.
  • Stiles' friend Heather' body was found by police, along with the bodies of a girl named Emily, who was camping with her girlfriend Caitlin in the woods, and a lifeguard, all of whom were virgins prior to their deaths. They also were killed via the "three-fold death," where the killer strangled them, slit their throat, and bashed in their skulls.
  • Lydia found her first body in this episode after going into a fugue state and unconsciously driving to the swimming pool instead of the pharmacy like she intended. This is the follow-up to Lydia's horrified scream in the previous episode, which was the first hint as to her supernatural identity.
    • She and Stiles also reference the fact that the last time she had a fugue state, she was being controlled by Peter's spirit, which occurred from Omega to Party Guessed in Season 2.
  • Derek met Jennifer Blake for the first time in this episode, marking the start of a significant relationship between the two.
  • This episode marks the first appearance of Deputy Tara Graeme, Sheriff Stilinski's partner.
  • Chris Argent references the decimation of his family, including his wife, his sister, and his father, along with the corruption of his daughter, due to the supernatural world.


Trivia Edit

  • The title refers to the fireflies Argent and Scott saw out in the woods, which were a bioluminescent variety that is uncommon in California and were implied to be related to the recent supernatural phenomena in Beacon Hills. Interestingly enough, fireflies also play a role in the second half of Season 3 regarding the Oni.

Body Count Edit

Locations Edit

Soundtrack Edit

  • "Ready to Go" by Guards
    • Lydia rubs her temples in her bedroom and prepares to leave to go to the pharmacy for pain relievers for her headache
  • "Do It" by Shana Halligan
    • Emily and Caitlin make out and snuggle in an elaborately decorated tent in the preserve until Emily becomes freaked out by all of the bugs

Gallery Edit

TBA

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