Supergirl (2015–…): Season 3, Episode 20 - Dark Side of the Moon - full transcript

Supergirl is stunned to discover that a part of Krypton survived. Meanwhile, Alex is attacked while out with Ruby, and Lena considers how far will she go to keep Reign contained.

Previously on Supergirl...

I imagine you have questions.

I have answers.

What is this place?

A piece of your world,

the dead planet Krypton.

I love you so much.

- I saw her face.
- Mom?

That was her.

I will do everything within
my power to keep you safe.

The Rock of Yuda Kal.



Made of Kryptonian stone.

Well, if the Rock of Yuda Kal can be
used to make a Worldkiller,

we could just reverse the process
and use it to unmake one.

We could turn Reign
back into Sam permanently.

We can cure her.

Now, it is very rare,

but the exact same rock
is hurtling through space

on a meteorite
about five light-years away.

We better get a move on.

I always forget how beautiful
it is this far out in space.

It's perfect.

Out here with just you,

I don't have to pretend.
I can just be me.

We're coming up on it.



What is that?

It's a tractor beam.

Everything's locked up.

Thrusters, roll,

yaw, pitch. Nothing's responding.

- What if we're not us?
- What?

This ship can turn into other things.

Brainy's gonna be so sad
he missed this.

Agent Schott.

Any word from Supergirl?

No, but we expected that.

They're on the dark side,

which means they're
probably scraping off

a nice chunk of space rock

off a much larger piece
of space rock any minute.

I need to know the second
they're on their way back.

Well, I got the radio
dialed up to 11.

Like, I re-tasked
six military satellites

to scan all airspace
around the meteorite,

and then I've just been obsessively
checking that scan

for, like, the faintest blip.

- I will not miss them.
- Hmm.

And yet you seem, uh, more stoic
and grave than usual,

which, if we're being honest, is
making me, like, a little bit queasy.

What haven't you told me?

Reign is becoming immune

to Ms. Luthor's synthetic Kryptonite
faster than we expected.

Oh.

To be on the safe side,
I've evacuated L-Corp,

and I have a strike team standing by

with sound guns, body boots,
and red sun grenades.

Because that's worked
approximately zero times before.

Do I seem appropriately stoic
and grave to you now, Mr. Schott?

Better crank that baby up to 12.

The cosmos,

a tree of infinite branches
flowering with stars.

Now, Supergirl is up there right now

on a mission to find a substance
that's gonna fix your mom.

...in constant motion.

There's so much nothing.

What if she doesn't
make it back in time?

She's called "Supergirl" for a reason.

She will, I promise.

Hey, you know what?

Why don't we get out of here?

I just happen to know where
there is a wicked ice cream truck.

And, I mean, all the toppings.

That's all I need right now.

Let's do it. Me, too.

- I could definitely be an astronaut.
- Mmm.

I could see that.

You know, once you get past
your motion-sickness thing,

I think you'll be golden.

That's funny

'cause I never got motion sickness
until you started driving me around.

Ah, boo.

All right, look, let me see.

Oh, yes, that is amazing.

I'm getting you that hat.
You look adorable.

That's really cute.

Wait, let me see. All right.

Excuse me.

Okay, I'll tell you what.

Why don't I pay for all these things?

Give me that.
And then you go get us some sodas.

All right.

Don't think I'm not gonna
count all that change.

Gun!

Everybody, get back.

Could you please not blow up my lab?

So it's explosives
they're carrying.

Your wall doesn't work anymore.

Neither does your Kryptonite.

I'm getting stronger.

Good morning, sunshine.

You're very chatty today.

How much longer do you think
you can hold me?

Long enough.

Long enough

for Supergirl to return.

That's right.

I see you, Lena Kieran Luthor.

I see your anger, your fear,
your distrust.

Supergirl is your Hail Mary.

You need her right now,
and she needs you,

but when this is all done,

will you still need each other?

Supergirl and I
may not see eye to eye,

but there's one thing
we can agree on.

And that's that
you need to be stopped.

So enjoy your moment
in the sun, Reign,

'cause we are gonna save Sam,
and end you.

The only way to end me is to kill me

and Sam.

And I don't think
you have the stomach for that.

There's an entire city here.
How did we miss this?

We're on our own.

And powerless.

Well, we expected that.

That's the only thing
we've been right about.

Looks like the Black Rock
is about a mile into the city.

We better get moving
before they find us...

Watch out!

I think we lost them,

whoever they are.

We have other problems.

They seem human.

At least we fit in.

I'm not so sure about that.

We need to change.

- Let's go.
- Yeah.

You okay?

Yeah, just thinking how ironic this is.

Donning disguises
across the solar system

seems to be my karma.

It's necessary for survival.

So is Kara Danvers.

I just wish my day-to-day life
didn't have to have a disguise.

It's exhausting.

In the future, I just live in the open.

All Legionnaires do.

There's no secret identities,
no disguises.

24/7, I'm just me, Mon-El
from the Legion of Super-Heroes.

And it's still exhausting.

What we do,
the responsibilities we have,

there's always a trade-off, isn't there?

Hmm.

We're getting close.

It's this way.

This place is intense.

Yes. Definitely don't touch anything.

Agent Danvers. Ruby, how are you?

Oh, my gosh. It was crazy.

There was this guy at the park,
and he was shooting,

and everyone was running,
and then Alex caught a grenade.

It's really just not that big of a deal.

I mean, we're fine,
so everything is chill.

It's just super chill.

Are you chill?

Listen, you know what?
I have some work that I have to do,

so how about you just start reading
that Ada Lovelace book I got you?

- Sure.
- Yeah? All right.

Why don't you go
into the conference room?

Get your read on.

Someone's trying to kill me.

Oh, things are not chill.

Are you sure
you were the target?

A hundred percent.

Guys, this is really bad. Okay?

I can't have some psycho
who's trying to murder me

out there on the loose
while I'm taking care of Ruby.

I mean, she's been through so much.
She's seen so much.

And God forbid, what if she got hurt?

And it's on my watch.
I... I can't live with that.

All right, all right, let's just...

Who would want you dead?

Where do we start?

Okay, well, there's Griggs,
the Hellgrammite, Hannibal. I mean...

Look, the Hellgrammite and Griggs
have been in containment.

So that's a no.

Hannibal, we deported
after the Daxamite invasion.

- Right.
- Okay, so let's just

keep narrowing it down.

Who else has
tried to kill me before and failed?

What about good ol' Ricky, huh?
He definitely hates you.

Or hated.

- I mind-wiped him, remember?
- Oh.

But we shouldn't discount
people from your past.

If this really is personal,

it may be someone
from before your time at the DEO.

Somebody who may have
threatened you before.

Pull up Ron Collins.

"Ronald Collins." Let's see.

Age 56.

Recently made parole
after six failed attempts. Wow.

Uh, let's see. He was in for...

First degree murder.

I should know.
He was my first arrest.

I'm sorry. That would have
made you 17 when you arrested him.

Yeah, that tracks.

He lived his whole life in Midvale,

and then he moves to National City
after he was released from prison?

It's a big city.

And yet, he moved within
six blocks of your apartment.

Okay, I ruined his life.
He's trying to ruin mine.

That's him.

Um...

- Winn, about Ruby.
- Hmm?

No! No, I can't.

No, I do not babysit anymore.

She's 12, okay? She's not a baby.

So, it's just...
You know, your words.

Chill, it'll be fine.

It takes a village, Agent Schott.

The Black Rock
is definitely in there.

Let's go.

Kara.

"And on Earth, the soul is lost

in destruction.

May their flames forever burn
in Rao's light."

It's a Kryptonian memorial.

- This is Krypton.
- No.

Argo.

Don't move.
Identify yourself.

Stay where you are. Do not move.

Stand down, caretakers.

Mom.

Kara?

Is that you?

How...

How are you alive?

Your father created a shield
to protect Argo

when Krypton exploded.

We would never have sent you away
if we had known it'd work.

I thought you were dead.

I don't understand. I saw your pod

get knocked into the Phantom Zone.

I... I was stuck there for years,

but somehow, my pod got loose,

and I fell to Earth with Kal-El.

Kal made it? He's alive?

He got there first.

If I had known.

If I knew Argo was here,
if I knew you were alive,

I never would have stopped
searching for you.

I recognize you.

The Prince of Daxam.

There is no more Daxam.

I'm just Mon-El now, ma'am.

There's no more Krypton, either.
Only Argo.

And you are welcome here.

Thank you.

If you didn't know I was alive,
and you weren't searching for me,

what brought you here?

Earth. Earth is in trouble.

When Krypton exploded,
the followers of Yuda Kal

sent three pods after me,
each with a Worldkiller.

A Worldkiller?

I stopped two of them,
but one remains.

Reign.

And she's terrorizing Earth.

She's hurting people I love,
murdering indiscriminately.

And we think we found something
that could stop her,

and we followed
its radiation signature here.

Harun-El.

The Black Rock of Yuda Kal.

You know what it is?

After the fallout, ashes
and destruction poisoned the air.

We had nothing to protect us
as we hurtled through space.

The young and the old
were the first to become sick.

They struggled in our new atmosphere,

their lungs more vulnerable,
more weak.

But after the fallout passed,

the shield kept
our atmosphere more hospitable.

It is what your father
gave his life for.

There was no more time.

Argo was in constant darkness.
We were running out of air.

We were dying.

Your father repurposed
his unfinished research

to create a livable environment.

He believed that the Harun-El
could act as a shield for the city,

and he was right.

His legacy keeps our air breathable
and shields us from invaders.

It keeps us hidden...

That's why we didn't detect you
in our scans,

why there were no signs of life.

And why we can't
get in touch with Earth.

- No signal can get out.
- Exactly.

We mined all the Harun-El left.
All of it is here.

And every ounce of it
means one more moment of life.

Because of that,
we have none to spare.

There's gotta be a way.

We only need a little bit.

It is not mine to give.

But I will call a meeting
with the High Council.

Thank you.

It'll take a few hours
to gather the members.

In the meantime,

I was hoping
to get to know my daughter.

Have you heard anything
from Supergirl yet?

No. That's why
I'm still sitting here.

Can you show me how this all works?

You know, no offense, kid,
I really... I don't need help.

Then I can just keep you company.

You know, I'm really busy. Um...

- Yeah, you seem stressed out.
- Do I seem stressed?

Do I? Really? Oh, well, you know,
I have been staring

at this stupid computer monitor
for about 36 hours.

I haven't slept,
haven't eaten anything,

haven't even had time to go get

my damn pizza bagel
out of the microwave.

All I've done is monitor about
10 million miles of outer space,

waiting for confirmation
that Supergirl...

Supergirl is on her way back to Earth
with the Black Rock of Yuda Kal,

- so we can finally stop and defeat...
- My mom.

You... Well, um...

Reign is technically not your mom.

You're right.

Reign is a monster,

and my mom has disappeared.

I might never get her back again
or even see her,

especially if Supergirl
doesn't come back soon.

Yeah. Yeah, sorry, um...

I don't sleep anymore, either.

I'm exhausted, too.

- Where are you going, Sheriff?
- Far away from you.

That's right. That's because
you prefer to shoot from a distance

or behind the back like a coward.

Kenny Lee was a long time ago.

I'm not talking about Kenny Lee.

Two of whatever he's having.

I'm not surprised.

You sent me to jail when you were...

- Seventeen.
- Seventeen.

You're trying to kill me.

Are you kidding?

You tried to shoot me,

this morning, at the park.

At the park?

Man.

Are you still 17?

You don't even care
about the countless kids

that you could've hurt
trying to get to me.

Then again, what's one more
dead kid to you, right?

I owed a debt for what I did.

I paid my debt.

What you did was murder
a teenage boy.

And I have to live with that!
Forever.

Oh, I... You want me
to feel sorry for you?

Why would you?

I don't even feel sorry for me.

Every time I close my eyes,
I see that young boy's face,

the future that I stole from him.

I see the blood
bursting out of his body.

I can feel the weight of the gun
in my hands.

I wasn't a good person.

I was corrupt.

Then, I never thought of myself
as a killer.

Kid killer.

But it turns out, I was a monster.

And I deserved everything I got.

But I'm not trying
to kill you, Danvers.

What the hell difference
would that make?

It's not gonna bring Kenny back.

It's not gonna save me.

I'm already damned.

J'onn, it's not Collins.

Seriously?

I was so sure it was the Sheriff.

We'll figure this out.

The list of people
that want me dead is endless.

All the more reason to cull it.

No, J'onn, look,
you don't understand.

If Sam is gone,
I am all that Ruby has left.

And if I'm gone...

Screw the list.

If this guy wants me,
he can come and get me.

It's our turn to hunt.

You wanna set a trap.

Like I said,
I'm already a target, right?

So let's draw this guy out
and take him down.

I remember this flower.

This is a Dar-Essa.

You kept one in my room
when I was little.

It was a gift from Grandmother
for your first birthday.

Yeah, you used to measure it
to see how tall it was.

It was, um... Wasn't it supposed to...

Grow as you grew?

Yes, I got it for you
when you were so little,

but you outsped the Dar-Essa.

You grew so tall so fast.

I can't believe it survived the fall.

It's strong, like you.

I feel as though I've let you down.

- Mom...
- No, please.

I shouldn't have accepted
that you died.

I had always taught you to hope.

But I gave up.

I could say the same.

I gave up hope.
I thought you had died with Krypton.

But here I am, and here you are.

So tell me about your life.
I've missed so much.

Uh...

Okay. Uh...

I was taken in
by this amazing family.

Jeremiah, Eliza, um,

a sister, Alex.

A sister?

And she's so much more than that.

She's a friend. She's amazing.

Um...

Fort Rozz crashed on Earth.

Fort Rozz was my deepest shame.

The prisoners, they all survived?

Astra survived.

Non, too.

I've thought of her so much.

I should've listened to her,
but the way she did things was so...

Wrong.

Yeah.

Her and Non tried to bring
terror to Earth for a while,

but she changed.

Well, she was changing

before she died.

We gave her Kryptonian burial rites.

On Argo, we learn
from Krypton's mistakes.

We look to our past for edification.

My mistakes were the biggest of all.

I sent so many

to suffer at that prison
without a second thought.

You just... You did
what you thought was right.

So did Astra.

But I was wrong.

It took losing you,

losing everything, to learn that.

Can you forgive me?

Of course, I do. Of course.

Excuse me.

My friend and I
were in trouble earlier,

and we needed to borrow these
so we could fit in.

You mean you needed a disguise.

The daughter of the great House of El
back from the dead.

That's all anyone
could talk about today.

I'm afraid I don't have any money
to pay you for these.

Oh, keep them. It's a gift.

It's my honor.

Perhaps I could give you
a gift in return.

Your son, he has thalenite lung?

Yes.

Val?

Krypton eradicated the disease
when I was still a child,

but much was lost.

This is Val.

Hey, Val. I'm Mon-El.

You may not believe this, but I'm
actually... I'm from the future.

So is this.

This is called a...

You know what?
It doesn't matter what it's called.

What matters is that a really,
really smart friend of mine,

he made it.

His name is Brainy,
so it's gotta work, right?

Can I see your arm for a second?

Yeah.

It's a built-in size
of vaccine and booster.

It'll automatically detect
hostile cells and deploy antibodies.

He should wear it for a week.

And then

maybe you can find someone else
who needs it, and give it to them.

See?

It's a miracle.

Slept here again, huh?

I don't really have much choice.

Hmm.

Reign's becoming immune
to my Kryptonite.

If Supergirl doesn't get back soon,

she'll become stronger and break out,
and then God knows what will happen.

But I can still flood her system
with the Kryptonite. It would work.

She would OD, but...

She would die.

So you lose Sam.

It's Sam or the world.

Well, there's still a chance that
Supergirl can come back in time.

And if she doesn't?

James, I don't know what to do.

What would Sam want you to do?

Sam wanted me to heal her.

No. Not what Sam wanted you to do.

What would Sam want you to do now

with the choice
that you're presented with?

She'd choose Ruby

over anything,

even her own life.

She'd want me
to protect her daughter.

It's a difficult choice,

but it sounds like
you have the answer.

I'm a... I'm a jerk.

Yeah.

I know what you're going through.

I actually do.

I had a very complicated relationship
with my dad.

He actually tried to kill me, too,
believe it or not.

And, you know, for the longest time,

dude, I was terrified

that whatever made him what he was,

like, that
that was inside of me, too.

You know, that evil.

I know what you mean.

But you're not evil.

No. No, I'm not.

Just a jerk.

Hey, Supergirl's coming back.

And I kind of need some help.

Maybe you could

aid me in tracking Supergirl?

Oh, come on. I'll teach you
how to be a jerk.

Is everyone in position?

I repeat. Is everyone in position?

We're good to go, J'onn.

Copy that.

Keep your eyes open, everybody.

Where have you been?

Sightseeing.

You didn't need
that disguise after all.

You get to just be you here,

- Supergirl.
- Not Supergirl.

Kara Zor-El.

Are you ready?

Yes.

Allow me to introduce my daughter.

Kara.

Welcome home.

Esteemed members of
the High Council of Argo City,

thank you for seeing me
on such short notice.

Alura is a pillar of our community

and a long-standing member
of this council.

We would be remiss
in refusing her daughter an audience.

As you may know,

Zor-El and I came up
with a plan to save Kara

during the dark days
before Krypton's destruction.

We didn't know
that Argo could survive,

and so we put Kara, our only child,

into a pod, and we sent her to Earth.

Its people took her in.
They saved her.

And in exchange,

she serves the people
of her adopted home.

She's a hero

that embodies our greatest ideals.

But unfortunately, Kara was not
the only Kryptonian to travel to Earth.

A Worldkiller followed.

You must forgive our skepticism.

You've been away a long time.

Here on Argo,

Worldkillers are the stuff
of children's stories.

I, too, was hesitant

to believe that such a thing
could be real,

but I faced it.

She is real.

And she calls herself Reign.

I traveled here from across the stars

because I could not
defeat her myself.

And Earth is in grave danger.

An unfortunate situation if true,

but how can Argo be of help?

Indeed.

We are a recovering city,

still limping and wounded
from the trauma of destruction.

We can't communicate
outside our protective dome,

let alone send troops or aid
beyond its border.

It isn't troops we need.

Then what is it you seek?

A gift

of Harun-El.

Any sign of the suspect?

All's quiet down here.

But I'm completely exposed,
so if he's gonna strike,

the time is now.

Come on. Where are you?

You would have us give away
our most precious resource,

our only lifeline,
to an alien species?

The people of Earth share our ideals.

They're more like us
than you realize.

Or perhaps you've become
more like them than you realize.

With all
due respect, Councilman,

the danger currently facing Earth
is of Kryptonian making.

And I need not remind you, Alura,
that Krypton is dead.

Argo City is all that remains.

And yet the sins of Krypton live on
in this Worldkiller.

Can you abide this as our legacy?

This council does not concern itself
with legacy, only survival.

And what is the point of survival
if there's no soul to save?

I agree with Judas.

His position is wise and thoughtful.

Status check.

No sign of your suspect.

Wait a minute.

I think I got something.

Northwest. Baseball hat.

J'onn, we're made.

I think he knows that you're not me.

How did he know which one
of us is which?

I don't know, but he's on the move.
I'm going after him.

Wait for backup, Agent Danvers.

Damn it, Alex.

Your point is well made,

that Krypton is dead.

But its legacy lives on

for good and ill.

My own mother sentenced prisoners
to Fort Rozz,

prisoners who broke free
and took their anger out on Earth,

many of whom we're still trying
to apprehend.

There are people on Earth
who work every day

to solve the mistakes of Krypton's past.

People who are trying
to make Earth fairer

orjust better.

These people dedicate their lives
to this work,

and some have even given
their lives to it.

This planet, these...

These people, they took me in.

An alien immigrant from a world
they knew nothing about,

a world whose legacy
threatened their way of life,

and their safety, again and again
and again.

And now, they deserve it in kind

because their very existence

is threatened by this Worldkiller
of Kryptonian making.

My mother tells me
Argo City has changed,

that it has learned from the mistakes
of Krypton's past.

So I beg you.

Give us the gift of Harun-El.

We don't need very much.

And this bit of charity,

it will save Earth.

Well said, Kara Zor-El.

But my concern is for those of us
you left behind.

I'm afraid we cannot spare the Harun-El.

Hello, Agent Danvers.

That was a neat trick
with your Martian pet.

- I recognize you.
- Not me.

My twin brother.

And you should.
After all, you arrested him.

He was on Fort Rozz.

- He killed 12 people.
- Lies!

Who votes with me?

And those who believe we should help
the people of Earth

in their time of need?

And how do you vote, Selena?

If this Reign is as strong
as you say she is,

are you sure this plan will work?

I am.

We will give you what you seek.

Thank you.

Argo was spared the fate
of the rest of Krypton.

But what value is our civilization
if we don't use our stolen time

to right the sins of the past?

We must set an example
for future generations,

or else our survival means nothing.

Thank you.

May Rao's light shine upon you.

It was a pleasure meeting you.

I'm very fond of your daughter,

as are many others on Earth
and across time.

You should be very proud
of what she's become.

I am.

It's amazing that something so small
and unremarkable

could hold the key
to so much survival.

For you.

The last time I left you,
I thought I'd never see you again.

I know better now.

Now go save your friend.

Earth is waiting for its hero.

Hey, we just finished
interrogating your attacker.

He's from Naja Falk 7.

He was able to tell us apart
with his heightened sense of smell.

A whole list of suspects from my past,
and he wasn't even on it.

Yeah.

You know, when you first approached me
about working at the DEO,

I was failing med school.

I was drunk.
And I was completely lost.

But you, J'onn, you gave me purpose.

You know, something to stand up for,
something to devote my life to.

But today,

I risked my life for it.

You know, I jumped straight across
without hesitating,

without even thinking.

And to be honest,

I mean, that wasn't even
the tallest building

that I have jumped off of
in the line of duty.

You are someone who makes
the hard choices, Alex.

You go the extra mile.

Yeah, exactly.

And that's who I am.

It's just baked into me.

You know, jumping buildings,
making enemies.

That's all part of the job.

Hmm.

But the irony here

is that the thing that I had to do
to save myself

is the very same thing
that could have killed me.

I mean, one more inch,
and I would have died.

And then

where would she be?

I broke up with Maggie because
I wanted to be a mother.

And one day, I will be.

You know, whether I'm with somebody,
or if I'm doing it by myself.

I know that's what I want.

And I know that that is who I am.

Just like I know that I'm the person
that's gonna jump the building

to stop the bad guy.

And I keep wondering.

I mean, can those two people coexist?

And is that fair?

Is it fair to the person
that I'm coming home to?

Hey, come on.

Look, you may be the person

who jumps the building
to stop the bad guy,

but you're also one
of the most intelligent

and intuitive women I know.

You're an incredible agent.

And I know you're going to be
an incredible mother.

So when the time is right,

I know you'll make the choice
that's right for you.

Thank you.

In the darkness
of Rao's absence,

I call upon you,
the bringer ofjustice,

the harbinger of death.

I call upon you, Worldkiller.

There's no one to pray to.

There is no God. There is no Rao.

There is nothing, except you and me,

and that kill switch you think
I haven't noticed,

the one that will end me
before I end you.

You're strong, ruthless.

You are so much darker
than you realize.

You're just like me.

You wish.

I don't have to wish.

I'm standing right here.
I can see it with my own eyes.

The same eyes that will set fire
to you and your world

if you don't press that button
and end me.

Lena, we're here.

Did you get the Rock?

Just in time.