[Kara] My name is Kara Zor-El, I'm from Krypton.
I'm a refugee on this planet.
I was sent to Earth to protect my cousin.
But my pod got knocked off course.
And by the time I got here,
my cousin had already grown up and become... Superman.
I hid who I really was until one day
when an accident forced me to reveal myself to the world.
To most people, I'm a reporter at CatCo Worldwide Media.
But in secret I work with my adopted sister and my friends
to protect my city from anyone that means to cause it harm.
I am Supergirl.
Previously on Supergirl...
[Brainy] The Phantom nested inside of him.
After a short incubation period,
the victim's life force leaves the body.
[J'onn J'onzz] They can now make new Phantoms?
[Brainy] The Phantom's created a new Progeny to destroy innocent people.
Where's M'gann?
She said that she was going on patrol.
No!
What if there is a way that we can harness
your piece of M'gann's soul to stop her from turning.
[gasps]
M'gann.
-[Zor-El] Kara! -Father?
Until yesterday, I thought my father was dead.
Are you a Fifth-Dimensional imp?
My magic is back.
Let's go save your father.
My mother built this Anchor
that tethers this place to the rest of the universe.
And there is a way out.
You mean my magic?
There's only one way to find out.
Here we go!
[Supergirl gasping and panting]
That Phantom almost made it through your portal with us.
I can still feel him,
like shards of ice coursing through my veins.
No one said pocket-jumping through the Phantom Zone
was for the faint of heart.
[shudders]
This is getting to you. I can see it.
The Phantom chills, the terror, it's becoming too much.
[Nyxly] Don't be such a killjoy, Papa El.
Because I think I found what we're looking for.
The Anchor.
We're going home.
[growling faintly]
[heart thumping]
[gasping]
[shudders]
Brainy, we've got five Prime Phantom Progeny in containment.
It's getting a little crowded down there.
I'll prepare another containment unit.
How many containment units does that make now? Is that four?
Supergirl would have stopped this by now.
And that brings us to the end of our Tower tour.
Thanks, Nia.
First days always make me feel like an awkward school girl,
so thanks to you all for making me feel so welcome.
I'd like to say on behalf of us all,
how great it is to have you with us in the trenches.
Finally.
M'gann, you should be resting.
I had a vision of Prime Phantom's lair.
I think I'm still connected to the hive mind
of Prime and his Progeny.
But how is that even possible?
When J'onn transfused his piece of M'gann's soul back into her,
it was just that, a piece,
and not the original soul in its entirety.
I estimate M'gann is still about 18% Phantom.
I hate that you're still linked in any way to his kind.
But don't you see? It's good news.
Phantoms have the power to sense a person's life force.
That means that I have that power, too.
I can use it to hone in on a specific life force anywhere,
even in the Phantom Zone.
I can find Supergirl.
-Are you serious? -We're gonna bring Kara home.
It also means that M'gann can use her power to sense
the life forces held captive in the Prime Phantom's lair.
There's a 99.999% probability that once we find and release them,
they'll immediately return to their rightful owner,
thus restoring the Progeny.
Prime will have his Progeny protecting his lair.
We'll have to be careful around those talons.
I may already have a fix for that.
I couldn't wait to get started, so I stayed up all last night
and made this.
I merged a DEO protogun and L-Corp's portal energy.
What is it?
Well, I call it a Prototrap.
It's designed to trap Prime Phantom and his Progeny hands-free
and transport them directly to containment.
Just like in Ghostbusters.
-Except that's a movie. -It's the perfect movie.
-The Prototrap is real. -Okay.
Rescuing Supergirl and stopping the Phantom infection.
I was afraid it was never gonna happen.
[device beeps]
The Progeny are hurting again.
There's a cold signature forming
at the Noonan's in Grand Central Station.
I'll monitor it from here.
May I?
Brainy, aren't you gonna want instructions?
I'm a 12th-level intellect, Lena.
I'll figure it out.
It's a macchiato mess.
[growling]
Brainy, Prototrap.
[Prototrap whirrs]
[growls]
Watch out for his talons.
-Should've stuck to decaf. -Look.
[screeching]
Her life force is leaving her.
Track it to Prime Phantom's lair.
Let's help M'gann...
You okay?
[growling]
-[snarls] -[M'gann] J'onn.
-[M'gann] No... -M'gann.
-She's in trouble. -Go, we've got this.
[snarls]
[growls]
There's been a precipitous drop in air temperature.
The Prime Phantom, look at his size.
[roars]
He grows bigger with every life force captured.
[Prototrap whirring]
He's fighting it.
We're gonna need a bigger gun.
[Brainy] M'Gann, J'onn, the Prime Phantom got away.
[metal creaking]
[straining]
[panting]
Sorry. I usually have super strength. I can just kick those down.
Are you sure this is right?
I mean, wouldn't it be too obvious if they put the exit
where you'd expect it?
The other buildings are barracks.
Supply room is built for the Fort Rozz prison guards.
I know it's in here. It should look like a mirror.
[Zor-El] That only the righteous can activate.
Instead of a reflection, you see your home...
and walk right through.
[lock trilling]
Oh, no.
What? What's the problem?
Kara, activate it. I need to be sure.
What do you see?
Just us.
It's not working.
I was wrong to have hoped.
The exit can't be broken.
Not after everything we've been through.
Nyxly, your magic.
Can you fix it?
I'll try.
I knew this was a waste of time.
What, you're just going to give up?
Father, please.
Please, think of everything we've accomplished already.
We made an ally where there were only enemies.
We found magic where there was only misery.
We found each other after decades apart.
We can't give up now. Not after all of that.
What else is there to do? The mirror can't be fixed.
Maybe not, but you knew Mother better than anyone.
And you know she never would have left her guards stranded, so think.
What would she have done?
She would have built a second mirror.
Yes. Where?
The supply rooms.
I remember following this life force
when I felt this tremendous force pushing at me.
It was like a part of me was draining away,
and then I saw I was turning into a Progeny again.
The double soul dilemma.
[sniffles]
M'gann's original soul is with the others
in the Prime Phantom's lair.
When she flew too close to it,
the piece that is her transfused soul sensed the original
and they repelled each other like magnets.
That's why I was turning again.
I was close to having no soul in me.
[Brainy] Based on the rate of Prime's accelerated growth
and disembodiment, he'll soon reach full maturity.
What happens after that?
He'll become unstoppable...
and it will be impossible to release the life forces
held in his lair.
That's what happened on Planet Dheron.
A Phantom was released there, too.
And just like Prime, he grew with every life force he took
until he became completely disembodied.
A small band of brave Dheronians
found the Chrysalis holding the captured life forces.
But its shell had hardened when the Phantom reached full maturity.
Even with their most powerful weapons,
they were unable to breach it.
The souls were locked in forever.
We need to find the Chrysalis before it fully hardens.
Great Sprock.
If we release the life forces from the Chrysalis,
M'gann will get her original soul back.
But then she'll lose her sensing power
to find Supergirl in the Phantom Zone.
Then we have to find Supergirl before that happens.
No. Absolutely not.
First we need to focus on defeating Prime
and releasing the captured life forces.
-But J'onn-- -If we don't act now,
not only will National City be lost...
but the infection will reach a point of a no return.
A global pandemic.
If we only go after Kara,
she'll come back to find another Phantom Zone
right here on Earth.
Okay, then we do both.
We rescue Kara and we defeat Prime.
Guys, we can do this.
We can do anything if we just put our minds together.
We always find a way.
Absolutely. There's got to be another way to find Prime's Lair.
There is still a way, if we combine M'gann's sensing power
and Dreamer's ability to astral project.
So I'll work on a way to try and copy M'gann's sensing power
to track Supergirl. See, it's win-win.
You heard the lady, let's go.
-Hey, thanks for backing me up. -No, of course.
Okay. So what are you thinking?
Q-waves. I use them to replicate Malefic's powers.
I believe I can do the same with M'gann's sensing abilities.
And the nanobots?
I'm gonna task them to map the brains of the Progeny in containment
to create a device,
but even if I am able do that, I'm gonna need a piece of Kara's DNA
to calibrate the device to the right frequency in order to track her.
I know where we can find some.
Hey.
You okay?
You had a dream when we were at Noonan's, didn't you?
The same one. Kara and Alex in high school.
And I don't know why I keep dreaming it, or what it means.
Are you okay? You've practically inhaled every donut in that box.
Strawberry glaze with sprinkles is a rare delicacy.
That is true. But I know what this is, Brainy.
With your inhibitors off,
you're feeling a lot of emotions right now.
Lena advised me to embrace them.
Right now, you're not embracing them, you're eating them.
[Brainy] Mmm.
I've been there. Kara and Alex, too.
Their dumpling obsession.
A donut can't be there for you...
but I'm here if you wanna talk.
-It's not a problem, Nia. -Okay.
Well, I can stop comfort eating whenever I want.
[Nia] Okay.
Twenty-four storage rooms and still no mirror.
[Zor-El] Kara! Nyxly! I found it!
-[loud crashing] -[Zor-El screams]
What happened?
[Zor-El] It was the prisoner with the scar that captured me.
He must have been following us.
He attacked your father and then he tried to take the mirror,
but I chased him off.
I knew we shouldn't have split up.
[Zor-El grunts and pants]
-I think my ankle is broken. -Okay, don't move.
Okay. Slowly.
[Zor-El grunting]
-Nyxly, can you do anything to help? -I'll try.
[snaps fingers]
My magic is still depleted. I'm sorry.
I still don't get why I can't get anything right today.
I never should have left the two of you alone, defenseless.
I could have prevented this.
This is not your fault. It was my decision to split up.
You saved his life.
It will take both of us to get this mirror
all the way back to the Anchor.
Who's going to help your father? He can't even stand.
[Zor-El] Just leave me here.
No.
No. Absolutely not.
This area isn't safe for anyone with Scar and the Phantoms roaming.
Please, just take this mirror to the Anchor, activate the exit
and if it works, you can come back for me.
He has a point, Kara.
If we don't get him to the exit, his wounds will never heal.
Father, I can't just leave you here.
I'll barricade the door. I'll be safe.
No. I won't.
[speaks other language]
Please.
No one's called me that in decades.
[sighs]
We'll come back for you as soon as we can.
[Kara] Family isn't about blood or last names.
It's about the people who love you for who you are
and stand by you no matter what.
And just as my sister Alex has always been there for me,
so have my friends. They're my family, too.
Anything is possible when you have family who love and support you.
It's so amazing to see and hear Kara.
Feels so real.
I mean, I know she's not here with us, but...
She'll be here soon.
I know it.
We may not always agree, and at times that may break us apart,
but in the end, we always come back together, stronger than ever.
Hold on, sis. We're coming.
The core of this crystal contains Kara's digital life force.
I would like you to use it for the device.
What?
You said you need a piece of my sister
to track her in the Phantom Zone.
Yeah, but if I extract that, you'll lose the recording forever.
Well, what matters most is that we get back the real Kara.
And you said that life force can do that, right?
Yeah, I mean, I'm hopeful, but there's no guarantee.
I trust you.
Thank you.
Um...
I'll let you know when I'm done.
I'm gonna stay.
I would like to help.
Well, suit up.
[device whirring]
[J'onn J'onzz] M'gann will use her sensing powers
to find the highest concentration of life forces.
That should be Prime Phantom's lair.
Hopefully, in locating the lair, you'll be able to ascertain
the condition of the Chrysalis.
In particular, any hardening of its outer shell.
-You ready? -Let's do this.
[gasps]
[low frequency whirring]
All right, looking for clues.
[gasping]
Come on, they're counting on you.
[low frequency whirring]
Still translucent.
[whooshing]
-[snarling] -[gasping]
[gasping]
-Are you all right? -It was horrible. I'm so cold.
-Are you okay? -Midvale.
I saw Midvale again.
So, is that where the lair is?
I don't think so. I'm sorry.
But there's something else.
The Chrysalis, it's turning solid.
We're running out of time.
Based on what Dreamer just witnessed,
I've calculated that the Chrysalis will become impenetrable,
trapping the lost life forces in one hour's time.
Our only hope now is to find that Chrysalis before that happens.
If we release all of the life forces back to their rightful owners,
we'll cure everyone at once and disempower the Prime Phantom.
Well, we can't do that until we find the Chrysalis.
I can lead us to it.
No. No, M'gann. If you get too close, you'll transform.
-I'm not gonna lose you again. -We have no other choice.
Actually, we do.
It took some work, but it's finished.
With this, we will be able to find Kara in the Phantom Zone.
We'll finally be able to bring her home.
[sighs]
Not today.
Look, in less than an hour, the Chrysalis will harden over,
trapping all those souls inside it forever.
Plus more people are getting infected by Phantoms every minute.
It's spreading like a plague.
Now, I know how hard you worked on making a device that can track Kara.
But now we need to recalibrate it
so that we can find the Chrysalis instead.
But if we recalibrate it, we'll overwrite Kara's DNA.
We'll lose our only chance to save her.
We'll find another way. There's always another way.
-She taught us that. -We have a way now.
How can you choose to save anyone else over your own sister?
Because if I don't, countless lives will be lost.
Kara would always choose saving others.
That's just who she is.
And how do you think she would feel if we rescued her
and she found out that we let thousands,
maybe hundreds of thousands of people die,
just so we could have her back?
Supergirl relies on those that she loves to follow her example.
So please don't make this any harder than it already is.
Give me the device.
Alex, I hear what you're saying...
but I have to bring Kara back.
You see, it's my fault.
It was my brother who sent her to the Phantom Zone,
it was my experiments that empowered him.
It was my war with Supergirl that started all of this.
So if this is my only chance to make it right,
then I have to do it.
Okay, Lena, listen to me. Nobody blames you for this.
Kara doesn't blame you for this.
You two already forgave each other
for everything that happened in the past.
So it's time for you to forgive yourself.
And all that really matters is that you did the right thing today.
So, please give me the tracking device.
I'm sorry, but I can't take no for an answer.
[Supergirl] One, two, three.
Okay.
[exhales heavily]
[device trilling]
[whirring]
It's home...
It's beautiful.
Let's go find my father.
Kara, we can't.
-It's too dangerous. -What? No.
Kara, honey. I know you believe the best in people.
But don't you understand? Your father is beyond saving.
He's been holding you back ever since you got here.
Even today, you saw just how quickly he was ready to give up.
But he pushed through that. He got us here.
He also stuck you in a pod when you were just a child
and sent you to a foreign planet alone.
He banished you, Kara, just like my father banished me.
I'm sorry about what your dad did to you.
Truly, I am.
But I'm going back for him, whether you're coming with me or not.
I should have just slit his throat when I had the chance.
I was going to. I was this close.
Instead, I conjured myself up as Scar and I knocked him out instead.
I let him live for you.
You're the one who attacked him?
Mmm-hmm.
You wanted me to activate the exit because it wouldn't activate for you.
Oh! Don't act so shocked.
You wanted to be free of him,
just like I want to be free of my father.
You were just too weak to get rid of him yourself.
Hurting an innocent man doesn't make you powerful, Nyxly.
[chuckles]
I know what makes me powerful.
And the power that I have here
is only a shadow of what I'll have once I get to Earth.
Hmm.
I was going to go straight home to the Fifth Dimension
to punish everyone who didn't stand by me.
But you activated the exit.
In order for me to get to my home,
I'll have to go through yours. And you know what?
I think I'm gonna have a little fun while I'm there.
Over my dead body.
If I was a creepy Phantom, where would I keep my lair?
Oh, I know. The sewers.
It's getting cold in here. We must be close.
[device beeping]
This way.
[low growling]
Which way?
[snarling]
This way looks promising.
[snarling]
[grunting]
Alex...
run!
[snarling]
[J'onn J'onzz screaming]
[device beeping]
[Brainy screaming]
-Brainy! Brainy! -No!
Don't. Don't.
Get to the Chrysalis. Go!
No. Come on. Come on.
[device continues beeping]
Up we go.
[device continues beeping]
[device beeping rapidly]
It's a Phantom Zone on Earth.
[snarling]
No matter what happens, don't stop.
No! No!
Sentinel, do it now.
[snarling]
[whooshing]
[people chattering indistinctly]
[snarling]
[exhales]
[J'onn J'onzz chuckles]
[grunts]
[Nyxly] You know, this is fun.
But it gets old after a while.
[automated voice] Prisoner interference detected. Self-destruct activated.
The impact must have activated the self-destruct.
We have to get out of here.
The only way I'm leaving here is through that exit.
[alarm blaring]
I can't let you do that.
[laughs]
Go ahead. Take your best shot.
You and I both know that can't hurt me.
[beeping]
I know.
No.
-No, no, no. -Nyxly, we have to go.
[alarm beeping rapidly]
Nyxly... Nyxly, now.
No!
[automated voice] Self-destruct in five, four,
three, two, one.
Thank you.
You were right about the Chrysalis. I'm sorry I fought you on it.
I understand why you did.
That's a decision I didn't wanna have to make.
But you still made it.
[sighs]
Listen, I am so grateful to be a part of the team here in the Tower,
but I don't think I belong.
Why would you say that?
Well, it's like you said.
I need to stop atoning for the sins of the past.
And I am determined to do good in the world, but...
You and J'onn, Brainy and Nia, I'm not like you.
You're true heroes.
I know how much your sister means to you, Alex,
and yet, today you made the most painful sacrifice
because it was the right thing to do...
and I don't think I could do that.
Every moment I was running towards that Chrysalis
I wanted to turn around.
I didn't care if that Phantom took over the whole city
or the whole world.
I wanted nothing more than to drop everything
and go after my sister.
I had to rely on my years of training as a soldier
to help me push those feelings aside
so that I could do what had to be done.
You've have a huge heart, Lena.
And wanting to save Kara,
that doesn't make you any less of a hero.
Yeah, maybe not. But I still don't think like you.
Neither does Brainy. Or J'onn, or Nia.
I mean, we all have different life experiences
and perspectives and strengths.
It's our willingness to hear each other out,
that's what makes this a great team.
And if it weren't for your brilliance in making that device,
we all would have failed.
You belong here, Lena.
You always have and you always will.
And besides, you are the only with a decent taste in Scotch.
In spite of everything we went through today,
we're are still back at square one.
No closer to getting Supergirl back.
And no matter how many donuts I eat,
this hopeless feeling just won't go away.
I feel it, too.
I've had more dreams about Midvale.
What do you think they mean?
I don't know.
I'm scared, Brainy.
These dream flashes of Midvale, Kara and Alex in high school.
They keep happening, confusing me, and I don't know how to stop them
or interpret them.
I just wish my mom was here.
Look, I'm sorry you don't have your mom.
But you have me.
We have each other.
[J'onn J'onzz] The Prime Phantom will never hurt you,
or anybody else, ever again.
-I'm glad you're okay. -Me? I almost lost you today, too.
Well, now you know how it feels.
[chuckles]
If only there was a way to use Prime to make a new tracking device.
I mean, if he was part human, like the Progeny.
I tried searching his mind,
trying to convince him to look for Kara...
but all I could sense was thirst and misery.
He has no humanity, only instinct.
Instinct. The Phantom, he tracks by instinct.
He's a bloodhound.
If we can get our hands on more of Kara's DNA...
Then he'll track her by instinct.
It's a good idea, but the hologram crystal is broken.
How are we gonna get more of Kara's DNA?
We can collect DNA from a Kryptonian after a solar flare.
Or Kryptonite poisoning.
Alex, can you remember all the times Kara blew her powers out?
It's only happened a handful of times.
Once was in a fight with Red Tornado
and then another was all the way back in high school.
-Back in Midvale? -Yeah.
Nia.
Cassandra, this is what my dreams have been about.
If we want to bring Kara home, we have to go back in time...
to Midvale High.
I just hope we're not too late.