- DEREK: Previously on - Teen Wolf...
- You know what I want - for my birthday?
- To not be - a 17-year-old virgin.
(SCREAMS)
- Stiles, all her friends - say you were the last
person who saw her.
You wanna help?
Find something real.
- Okay, they're - on our side now.
- Well, then maybe - you should tell her
- what her mother - was actually trying
to do that night.
- STILES: - There's a dead body.
It's Erica.
- SCOTT: - Who's the other girl?
- The one locked in - there with Boyd?
- She's my sister, - my younger sister.
- STILES: Scott, - you gotta get
out of there.
- They haven't felt - the full moon in months.
- No! Don't break - the seal!
(SCREAMING)
Got one!
- What are you doing, - dumbass?
- You're supposed to - put holes in the lid.
- Otherwise - you'll kill them.
- Do I have - to let him go?
Do you want him to die?
(SIGHS)
(GROWLS)
(SCREAMS)
Billy?
Run! Run!
He's gonna get in.
He's gonna get inside.
- Shut up. Shut up. - (GROWLING)
(WHIMPERS)
(SNARLS)
(METAL SCRAPING)
(CHILDREN SCREAMING)
(GROWLS)
(SHED CRASHES)
(SCREAMS)
(FIREFLIES BUZZING)
(SNARLS)
You lost them?
- SCOTT: (OVER PHONE) - Yeah, I kind of had to.
Wasn't exactly the plan.
- I know, which is why I think - that we should stick together.
- Trust me, - he's too strong,
too fast,
- and way too angry - for one person to handle.
- We've got to do - this together.
- Look, I'm at the trails - by the entrance
to the preserve.
- Can you meet me here? - Yeah.
- Just got to drop - something off first.
(UPBEAT POP MUSIC)
- Mom, - I'm going to the store.
Mom, do you hear me?
Of course
you didn't.
- You would have heard me - screaming like a lunatic.
Lunatic.
SCOTT: Is it them?
- We're not the only ones - that decided to
stick together.
- Is that gonna make it easier - or harder to catch them?
I don't know.
Derek.
- I saw Boyd try to rip - two little kids apart.
- Are they gonna do that - to everyone they find?
Everyone and anyone.
Oh, God.
(PANTING)
Oh, my God.
Oh, my God,
please don't be dead.
Please don't be dead.
Oh, my God.
(GROANS)
Are you kidding me?
(GROANS)
Oh...
(HYPERVENTILATING)
(SCREAMING)
- ALLISON: - She tried killing you.
Uh, yeah, yeah.
Why didn't you tell me?
- I'll tell you - everything, okay?
- I'll tell you anything - that you want to know,
but right now...
Just tell me why.
I... I couldn't.
- Allison, - I couldn't let that
be the last memory
that you had of her.
You coming?
- EMILY: Okay, - there is a snake out here
the size of a train.
Then kick it.
- Uh, yeah, - if I kick it,
- it will swallow my foot - and drag me back
down to Mordor.
Then jump over it.
(SCREAMS)
(LAUGHING)
- Oh! - Oh, whoa, whoops,
whoa.
- Oh. - (RELAXED POP MUSIC)
Wow.
- Nice touch. - (GIGGLES)
You're nervous.
You make me nervous.
- That a good - thing or a bad thing?
All good.
- Ooh, ooh. That is - a mood killer, though.
Better?
Better.
(SCREAMING)
- I can't... - I can't be in here, I...
Emily, wait!
Emily!
(SCREAMING)
Emily?
Emily, where are you?
Emily!
Em?
(LOUD RUSTLING)
(SCREAMING)
- CAITLIN: - Emily, where are you?
Emily!
(GROWLING)
(GROWLS)
(SNARLS)
(GROWLING)
(BOTH SNARLING)
- Are you okay? - What?
Are you all right?
- You need to get - out of here, okay?
Get out of the woods.
- Get out of here - as fast as you can.
STILES: Lydia? Lydia?
Lydia, are you okay?
I'm okay.
That, over there,
not okay.
- Yeah, all right. - I'm gonna call my dad.
I already called 911.
- You called the police - before you called me?
- I'm supposed to call - you first when I find
a dead body?
Yes!
- Are you sure? - STILES: (OVER PHONE) Yep.
- Throat ripped out, - blood everywhere.
- It's like the freaking - Shining over here.
- If two little twin girls - come out of the woods,
- start asking me - to play with them
forever and ever,
- I'm not gonna - be surprised.
- Can you get a little - closer to make sure
it was them?
Make sure it was them?
- Scott, who else is going - around ripping throats out?
Please just do it.
This doesn't
make any sense.
- The public pool is all - the way on the other side
of the woods.
- We haven't tracked them - anywhere near there.
- Derek, - they killed someone.
- How are they - moving so fast?
Derek.
- They can't be - that fast on foot.
They killed someone.
Some totally
innocent kid is dead.
And it's our fault.
It's my fault.
We need help.
We have Isaac now.
I mean real help.
- They're too fast - for us, for all of us.
- They're too strong, - too rabid.
- We'll catch them. - ISAAC: What
happens if we do?
- We're just gonna - hold them down
until the sun comes up?
- Maybe it would be - easier just to kill them.
- Killing them isn't - the right thing to do.
- What if it's - the only thing to do?
- If we can't even catch them, - what else do we do?
- Find someone - who knows what
they're doing.
Who?
- Someone who knows - how to hunt werewolves.
(POLICE RADIO CHATTER)
So, Caitlin,
- you and Emily, - were the two
of you drinking?
No, no.
TARA: Anything else?
Caitlin?
We split a tab of X.
Well,
MDMA can cause
hallucinations,
- and it could've been - laced with something, too.
You think I hallucinated.
You think you saw a girl
with glowing eyes and fangs?
And claws.
- Hey, we're gonna get - you to the hospital,
- figure out exactly - what it was that you took.
- What about - the other three?
The three guys?
- We'll need better - descriptions
of them, too.
- Let's get an APB - out on Emily.
- The other girl, - too, as soon as we get
- something better - than claws and fangs.
You believe her?
- STILINSKI: - She saw something.
You mean someone.
(SIGHS)
- It has to be - the one with the eggs.
(SIGHS)
Uh...
Hi.
- ISAAC: Do you think - this is gonna work?
DEREK: Nope.
Me neither.
So your, uh...
Your sister.
- Sorry, yeah, it's... - (CLEARS THROAT)
- It's bad timing. - I'm sorry.
- I'll ask later. - It's fine.
Or never.
- Yeah, yeah, - I'm good with never.
- First of all, - why would I care
- about anyone - related to Derek?
And second,
I don't know
this kid Boyd.
- I don't even - know his last name.
Boyd is his last name.
- What's his first name? - Vernon.
And just curious,
- is there a reason the gun - is still pointed at me?
- There's probably - still some part of me
that wants to shoot you.
I get that.
(SIGHS)
Scott, I watched my father
brainwash my daughter,
- almost turn her - into a killer.
- That world, - your world decimated mine.
My wife, sister,
father, my entire family.
- Why would I ever - step foot in it again?
- Because people - are going to die.
- And because - you know how to
catch Boyd and Cora
without killing them.
I'm sorry.
I can't help you.
Um...
- Do you think - you could do me, like,
one little, tiny favor?
- Left or straight? - Left.
- Sorry. It's right - around the corner.
That parking lot there.
- SCOTT: Yeah, just a little - further up, right here.
(POLICE RADIO CHATTER)
(GEAR CLUNKS)
- Thanks again - for the ride.
They did this?
Boyd and...
Cora.
- Where's the last - place you saw them?
- You're tracking - them by print?
Trying to.
- Well, then, you've - been wasting your time.
- There's only one - creature on earth
- that can visually - track footprints,
and that's man.
- And if you're not - trained like me,
- you have no idea that - this print is Boyd's
- and these... - Are Cora's.
Nope.
They're yours.
You trampled Cora's
as soon as you
walked over here.
- Listen, I know - the three of you
- are focusing - half your energy
on resisting your own urges
under the full moon,
- but that puts you at - a severe disadvantage
to Boyd and Cora,
who have fully given in.
- They put the pedal - to the floor
- while you three are barely - hitting the speed limit.
So what do we do?
Focus on your sense of smell.
- Actual wolves are known - to track their prey
by up to 100 miles
a day by scent.
- A trained hunter can use - scent to track them.
If the wind is with them,
- wolves can track a scent - by a distance of two miles,
- which means we can - draw them to us...
(GROWLS)
...or into a trap.
- Full moon does give - us one advantage.
- They'll have a higher - heat signature,
- which makes them easier - to spot with infrared.
- Thanks, - but I've got my own.
Just remember,
we're not hunting
wild animals.
Underneath those impulses
are two intelligent
human beings.
- Don't think they can't - rely on that human side.
It's suppressed,
but it's there,
reminding them how
to mask their scent,
how to cover their tracks,
how to survive.
- When's the last time - you saw your sister?
Nine years.
- I thought she - died in the fire.
- Do you feel like - you have a lock
on her scent?
Scott, how confident
are you in your skills?
Honestly,
most of the time,
- I'm trying not to think - about all the things
I can smell.
All right.
- The problem is - when they breach the woods
and hit the residential area.
- Once they're past - the high school,
- they're right in - the middle of Beacon Hills.
- They're not gonna kill - everything they see,
are they?
No.
- But there is an important - difference to recognize.
Wolves hunt for food.
- At a certain point, - they get full.
- 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.
And who knows
when that need
gets satiated?
We can't kill them.
- What if we can't - catch them?
- Then maybe we just - need to contain them.
- There's no one in the school - at night, is there?
- You want to trap - them inside?
- If there's somewhere - with a strong enough door,
- no windows or access - to the outside.
- What about - the boiler room?
- It's just one big - steel door.
- You're sure - the school's empty?
It has to be.
- There can't be anyone - there this late, right?
These are ultrasonic emitters.
- It's one of the tools - we use to corral werewolves,
- pushing them into a direction - we want them to run.
- Gives off - a high-pitched frequency
that only they can hear.
ISAAC: No kidding!
- These are gonna - drive them to the school?
And then it's up
to you to get them
into the basement.
Does anyone else
want to rethink the plan
where we just kill them?
It's going to work.
It'll work.
(BOTH GROWLING)
- You didn't have - to follow me home.
- I just wanted to make - sure you got in okay.
I had a police escort.
- I know the inner workings - of that force, all right?
- They're not nearly - as reliable as people think.
- Well, you also didn't have - to follow me into my room.
Well, I...
- Uh, yeah, I don't have - an answer for that.
I can leave.
- Are you really gonna go - without asking me the question
that you've been
dying to ask me?
Well, I'm not...
I haven't been
dying to ask anything.
- No questions - here for Stiles.
- Nothing. - (SIGHS)
- I can see it - on your face.
Maybe my face
just has, like, a naturally
interrogatory expression.
- Well, - your interrogatory expression
is getting on my nerves.
(SIGHS)
The answer is, I have
no clue how I ended up
finding that body.
I didn't even know
where I was until
I got out of the car.
- Yeah, but the last time - something like
this happened...
I know.
Derek's uncle.
Peter.
And the hunted
becomes the hunter.
You really think a few
high-tech dog whistles
are gonna help?
- I don't see you - offering a hand.
- Personally, - I'm trying to cut down
on futile endeavors.
Cora's alive.
I heard.
- Let's throw - the reunion party
- when she's not - an unstoppable
killing machine.
- I can stop her. - Sure you can.
By killing her.
Which happens
to be the point
of this little exercise.
Deucalion wants
you to kill them.
- He wants you to get - rid of his baggage,
- making it easier for - you to join his pack.
- The fact that it - was supposed to happen
in the vault,
and not up here,
out in the open,
doesn't change his plan.
- It just means - that Boyd and Cora
- are gonna kill a few - innocent people first.
And I should just let them?
- I should be okay - with innocent people dying?
- Unless you're okay - killing your own.
I can catch them.
- Oh, come on. - How much damage
can they do?
- So they off - a few homeless people,
- a drunk stumbling - out of a bar too late.
So what?
Let Scott deal with it.
- Let him be the hero - of his morally
black and white world.
The real survivors,
you and I,
we live in shades of gray.
- Then again, - even if you did kill them,
you're still an Alpha.
- You can always - make more werewolves.
Hey.
Over here.
- And if you tell anyone - that I showed you this,
I swear to God,
I will kill you
painfully and slowly.
- Why do you want - to show me a body
I've already seen?
- Because you haven't - seen everything.
See this around his neck?
That's a ligature mark.
- That means that - he was strangled
- with something, - like cord, rope...
- Ah, okay, - wait a second.
- What kind of werewolf - strangles someone?
You know, that's not
very werewolf-y.
My thoughts exactly.
And then there's this.
(SHUDDERS)
- God, man, what is that? - Is that brain matter?
- Yeah, - it's brain matter,
of course.
See the indentation?
He was hit in
the back of the head,
hard enough to kill him.
- In fact, - any one of these things
could have killed him.
- I mean, someone seriously - wanted this poor kid dead.
- All right, so then - this couldn't have been
Boyd or Cora, you know?
- They wouldn't - have done all that.
- So maybe this is - just one murder.
I mean,
maybe it's just
a random coincidence.
- I don't think - it was just one.
How come?
- Because that - girl over there,
- she's got the exact - same injuries.
(DOOR CREAKING)
(SIGHS)
Do you see that?
Yeah, it's a firefly.
No, no, I know, it...
What?
- It's, uh... - It's very unusual.
The California fireflies
aren't bio-luminescent.
They don't glow.
- Does that mean - something?
(DISTANT HOWLING)
(BOTH GRUNTING)
(GROWLING)
Oh, great.
- Come on. - (HORN HONKING)
(TIRES SQUEAL)
(BOTH GROWLING)
- SCOTT: - They're not going
through the school.
They're going over it.
- MELISSA: The ME said this one - wasn't just strangled.
- Whoever did it - used a garrote,
- which is a stick - that you put through
the rope,
- and you just kind - of keep twisting.
Stiles?
- Oh, my God, - did you know her?
- I'm so sorry. - I didn't even think.
I was...
I was at her party.
It was her birthday.
Her name is Heather.
- Okay, - we need to call your father,
'cause you're a witness.
Stiles?
HEATHER: Stiles,
- I just turned 17 today. - Mmm.
- And you know what - I want for my birthday?
- To not be - a 17-year-old virgin.
- Has anyone else - been through here tonight?
- Any other bodies, - or even anybody missing?
- Uh, no, no bodies, - but, um...
What?
Two girls.
- They brought - the first one in, Caitlin,
for a tox screen,
- and then I overheard - that her girlfriend, Emily,
just disappeared.
- I mean, they were - out in the woods and...
Nobody's found her yet?
I don't know.
- Okay, first one. - Caitlin.
Is she here?
- Is she here right now? - I think so.
- Okay, where? - Okay, okay, wait.
Just wait a minute.
- I have to talk to her. - Why?
- Because I think I know - what's happening.
The red doors,
someone has
to get them open.
- Someone has to - drive them inside.
- I'll go. - No. I'm faster.
(BOTH GROWLING)
(GROWLS)
Come and get us.
(GROWLING)
(BOTH SCREAMING)
(GROWLING)
- Did that actually - just work?
It worked.
- What are you hearing? - Heartbeats.
Both of them?
Actually,
three of them.
(METAL SLAMMING)
Hello?
Is someone there?
- We weren't doing - anything that bad.
- I mean, - I've camped out
there plenty of times.
Right, but why tonight?
We wanted to be
alone for one night.
Emily lives with her mom,
and I have three roommates.
- Not exactly romantic - settings, you know?
- How long have you - two been together?
Three months.
- And you wanted - to make it romantic.
Yeah, you know, because...
- Because it was - her first time.
- They're gonna - find her, right?
Aren't they?
What are you doing?
- Close the door behind - me and keep it shut.
You go in there alone,
- and you're either - gonna kill them,
or they kill you.
- That's why - I'm going in alone.
(GROWLING)
(ALL SNARLING)
(HEAVY THUD)
(GROWLS)
(HIGH-PITCHED RINGING)
(HEARTBEATS)
Scott?
The sun's coming up.
Scott!
The sun's coming up!
(PANTING)
There's a teacher.
I'll take care of her.
Get them out of here.
- So Boyd and Cora - might not have
killed anyone?
You're gonna wish they did.
Why?
I'm not exactly sure yet.
- The other girl who was - out in the woods, Emily,
- eventually they're - gonna find her.
She's one of them.
Emily, Heather,
- the guy Lydia - found at the pool,
all three were virgins.
And they're all gonna
have the same three injuries,
- strangled, throat slashed, - head bashed in.
- It's called - the threefold death.
So if these aren't
random killings,
then what are they?
Sacrifices.
Human sacrifices.