- To understand what I'm about to tell you,
you need to do something first.
You need to believe in the impossible.
Can you do that?
- Nope. I can't believe it.
Eddie Thawne is the avatar
of the Negative Speed Force?
- Yes. That's the reason the crystal
has been attacking us across time.
- It was charging with power.
- Sounds to me like
we could really use the Flash right about now.
[electronic chime] - Guys, can you hear me?
[dramatic music]
- Barry!
Oh, thank God you got out of there.
- Barely.
I'm on my way back to the hospital.
Any sign of damage to the timeline?
♪ ♪
- No temporal fracturing yet, boss.
- It's already started in 2049. If it spreads here...
- It'll threaten our entire existence.
[tense music]
[person screaming]
- [screams]
[panting]
What the hell?
[ominous music]
Flash!
What did you do?
Is this some kind of a prison?
Because you can't hold me!
You know that!
- Who dares disrupt my revenge?
I was about to slit that brat imposter's throat,
but now, I'm going to start with you first.
Unless you return me to where I came from immediately.
- And clearly you have no idea who you're dealing with...
otherwise you'd know how dangerous it is to threaten me.
- Like I care.
'Cause you're about to bleed
like everyone else I've slaughtered.
- [laughs] You got a few screws loose.
I like that.
- You won't when I'm plucking
those baby blues out of your corpse.
Now, tell me why I'm here!
- How the hell should I know?
Last thing I remember,
the Flash had just sicced his Time Wraiths on me.
- So that coward
is responsible for bringing us here?
- I highly doubt it.
♪ ♪
Welcome to the Negative Speed Force, fellas.
First time?
- You're Harry Wells.
You're the man who helped the Flash defeat me.
- No. That's Thawne.
The man who helped the Flash defeat me.
Any last words, Thawne?
- Never wear white after Labor Day.
And Zoloman--[chuckles]
Love your work.
Although slightly derivative, don't you think?
Pretending to be the Flash's ally.
Let's see. Who's playbook is that from?
- Are you mocking me? - Now, you're catching on.
Good, Zoom. - I'm the fastest man alive.
- No, you're a strung out, jumped-up Velocity 9 junkie.
The fastest man alive... [clicks tongue]
You're looking at him. - Oh, please.
I'm the one, true god of speed.
- No, I am.
Before I bring this dimension to its knees,
I demand to know who brought us here.
- I did.
- What the hell?
Boys, meet Eddie Thawne,
the dumbest branch on my family tree.
- Eddie Thawne.
You're Team Flash's old cop friend, right?
Well, that's--that's real good,
'cause I am great at killing cops.
- That's real big talk for a bunch of dead men.
- Liar.
I'm invincible!
- You sure about that?
- The Time Wraiths. - That's right.
You died, Hunter.
So did you, Hart, in the year 2052.
Oh, you, too, Savitar. - No.
- You all died.
Turns out none of you were powerful enough
or fast enough to defeat the Flash.
♪ ♪
But together...
we can do what none of you could do on your own.
- And tell me just how
does a complete waste of a human being like yourself
plan to defeat the Flash?
- Like this.
You want more speed?
I'll help you get it.
Enough to kill the Flash.
Now, who's in?
♪ ♪
[dramatic music]
♪ ♪
- [deep breathing]
[soft dramatic music]
- Iris.
- Oh, my God. You're back.
- Are you okay? How's the baby doing?
- The contractions are about two minutes apart
and Dr. Lockett said that I have about an hour.
- Iris, there's something you need to know.
The Negative Speed Force...
it chose a new avatar.
- Who?
- I hope I'm not interrupting. [chuckles]
- Oh, my God. Eddie?
- It's Cobalt Blue now.
Hey, Iris. Flash.
- Take another step closer to her.
- Oh, no. I'm not here to fight.
I just came to say congrats.
- Eddie, how are you alive?
- The Negative Speed Force brought him back.
Turned him against us. - It showed me the truth.
And it gave me the power to kill Barry
and end his bloodline forever.
- Eddie, you kill me, you kill the Speed Force too.
- Exactly.
And without the Speed Force
to bind it together, the timeline will fall.
And then I'll make a new one where I'm the hero.
It's not personal.
I just want my life back.
- The Negative Speed Force is a dark force of nature.
Why would it want to help you? - It doesn't.
It just wants to grow unchecked
without the positive side standing in its way.
- The negative side saved my life.
It wants me to win
and I'll be the one with a family.
- This isn't you. You're a good man.
Let us help you.
- You could've helped me before.
Instead, you looked the other way
while I shot myself in the chest.
Now, any last words?
- I've got three.
Run, Barry. Run.
[dramatic music]
♪ ♪
[Cobalt Blue snarls]
♪ ♪
[Barry groans]
- Eddie, please. Don't do this.
Nora.
- When Grammy Cecile calls from 25 years in the past,
you answer.
[dramatic music]
♪ ♪
- Looks like the gang's all here.
- It's over. You can't beat us all.
- I don't have to. You have your team.
But me?
♪ ♪
I've got a whole legion.
- Flash, Flash, Flash.
You didn't think I was gonna miss
how this all turns out, did you?
- We're going to slaughter your team
and end your legacy forever.
- No, you won't, and that's your only warning.
- Ooh, I like her.
But seriously, you don't stand a chance in hell.
- Tonight we change the future.
- Last chance to surrender, Flash.
- Execute Delta maneuvers.
♪ ♪
- Your mother escaped her fate, but you won't!
♪ ♪
[Savitar bellowing]
[metallic thudding]
- [sighs]
Schway.
♪ ♪
- Virtue! Show yourself!
- August, let me help you.
I can feel how scared you are.
Are you afraid you can't beat me?
Or that every time you kill,
you lose another piece of your soul?
- You want a piece of my soul?
How about a few dozen?
♪ ♪
[clones screaming]
♪ ♪
[clone screams]
So you beat my copies, but I'm the real deal.
The one, true god of speed.
[Godspeed screaming]
♪ ♪
- [sighs]
That's what I call mind over matter.
[suspenseful music]
- Now, that's how you do it, people!
Whoo! [chuckles]
- Hey.
- [gasps]
[tense music]
- I love what you've done with the place.
- We're gonna find a way to stop you.
- Maybe.
[laughs]
Maybe not.
But either way...
[Chester screaming]
♪ ♪
And just so you know... [Chester groaning]
Just so you're aware of the whole...
[blows air] "Timeline" of events here,
after I kill you I'm gonna kill your boss
because I don't care
what any upgraded ancestor of mine might say.
Barry Allen's life is mine...
to take... and so is yours.
[Chester screaming]
♪ ♪
[Reverse-Flash sighs]
[dramatic music]
♪ ♪
- Chuck!
No, no, no. It's okay, it's okay.
Chuck, Chuck.
No, no, no, no.
♪ ♪
- Right on cue. Khione called it.
- What now, Chief?
- Now, we get payback.
Get your hands in the air, Zoom!
This is your only warning!
- More of CCPD's finest for me to slaughter, huh?
You shouldn't have!
[tense music]
♪ ♪
- I already told you, Hunter.
No one dies tonight.
- The goddess and her sidekick.
Too bad neither of you are powerful enough...
[voice distorts] To lock up the darkness.
♪ ♪
- Everybody, down!
[screaming]
♪ ♪
- Eddie, wait!
♪ ♪
[Zoom bellowing]
♪ ♪
[Zoom groaning]
♪ ♪
- [groans]
Isn't this sweet?
Not only do I get to kill your boyfriend...
[tense music]
I get to kill you,
wearing the face of your old mentor, Nash.
- [sighs] Thawne...
[voice distorts] Stop talking!
♪ ♪
Chuck. Wake up, wake up. Chuck!
No, no, no, no. Wake up, Chuck.
Chuck.
No. Please. Wake up.
Please, please, please.
[cries] No!
[sobbing softly]
- [gasps]
[groans]
- Chuck.
Chuck.
[swelling dramatic music]
Chuck.
[Chuck groans] Chuck.
You came back to me.
- Always.
♪ ♪
- I don't want to hurt them, Flash.
And I won't if you surrender and let me kill you.
[tense music]
♪ ♪
[Cobalt Blue screams]
♪ ♪
[struggling] No. You stole my speed.
- Just another trick I picked up
from my Earth-90 doppelganger.
I'd stay down if I were you.
Hey there, kid.
- Great timing.
- I won't let it end like this.
I--I just need more speed.
♪ ♪
- Eddie, stop.
- Not until I'm the fastest man alive.
Then I'll be the hero, Flash!
♪ ♪
[thunder rumbles]
- My God, that lightning. - It's temporal fracturing.
The whole timeline's unraveling.
- Flash...
If Eddie wants more speed, he'll go to the source.
- The Negative Speed Force.
But if he keeps absorbing it...
- He'll overload and kill himself.
- Just like Thawne.
[thunder rumbles]
- There's lightning all over the city.
Does that mean...
- The whole timeline's breaking down.
- How do we stop Eddie?
- Now, that he's the Negative Speed Force avatar,
the only way to defeat him is to let it destroy himself.
Just like that last one.
- Okay, so let's do that.
- Eddie's a hero.
He saved my life once by sacrificing himself
to stop Thawne-- I won't let him die again.
I need to find a way into the Negative Speed Force somehow.
- Uh, I think maybe saving the universe
is a lot more important than just one guy.
- My wife is in the hospital
right now about to give birth to our child!
I am trying to save the timeline and Eddie's life!
- Son, as hard as it sounds, that may just be impossible.
[tense somber music]
- It can't be.
- I can get you into the Negative Speed Force,
but what will you do once you're there?
- Stop Eddie from killing himself.
- But that won't work because they'll just pick a new avatar.
- Then what am I supposed to do?
- You need to change his point of view.
- How?
The negative forces are at war with us.
They always will be.
They push, we push back.
We get stronger, so do they.
That's what balance means.
- It sounds like a never-ending cycle of violence and death.
- You think I don't know that?
Khione, for the last nine years
I have watched the people I love suffer and die.
I want a better world for my family, for everyone.
But I don't know how to do it.
- What if there's another way forward?
The more I embrace who I truly am,
the more I see the natural order of things.
You say balance is about violence and death,
but it doesn't have to be that way.
Nature is about more than balance.
It's about coexistence.
All things living together.
Not in conflict, but in mutual trust.
- Khione, the last avatar I faced...
I sat down.
I stopped fighting.
Thawne didn't.
You want coexistence,
but I'm sorry.
It's impossible.
- Then you need to believe in the impossible
because it's the only way to create a better world.
♪ ♪
[tense dramatic music]
♪ ♪
- Eddie!
♪ ♪
[Barry panting]
- What have you done?
- Your connection to the Negative Speed Force
is gonna kill you-- You have to let it go.
- Liar!
[Barry groaning]
You just want it all for yourself.
- I want to save you!
All that power is overloading your body.
You can't survive it. - Shut up!
♪ ♪
You stole my life!
♪ ♪
I hate you!
- I'm not gonna fight you anymore.
♪ ♪
- You didn't stop Thawne. I did.
I saved everyone. You know why?
[laughs] Because I always win, Flash.
- I always win, Flash.
- Always!
[high-pitched ringing]
[heart pounding]
[soft tense music]
♪ ♪
- Don't you see what's happening?
You've become the person you died trying to stop.
- He lies!
- Iris isn't your wife.
- Kill him now! Take back what's yours.
- I love you. - Eddie.
- You hold the power now. Use it!
End Barry Allen's pathetic existence!
- You have to remain as the avatar.
- Remember what he stole from you!
- You are the answer!
Thawne gave into hate, but you can fight it.
- It can still be yours. All of it!
It's what you deserve.
[gunshot] [casing clinks on floor]
- That's how we'll create a better world.
Both sides working together.
- Now! Kill him!
[gunshot] - No! Eddie!
- That's all I ever wanted to be.
Your hero.
[somber music]
♪ ♪
[Cobalt Blue breathing heavily]
[Cobalt Blue groaning]
[crystal clinks]
[suspenseful music]
♪ ♪
[thunder rumbling]
♪ ♪
From one avatar to another.
Just because I'm doing this,
doesn't mean we'll always see eye-to-eye.
We're still on opposite sides.
- I know.
Together, we'll find a way.
[slow dramatic music]
♪ ♪
- Tell Iris...
I'm happy for her.
♪ ♪
[Iris breathing deeply]
- Iris. - Hey.
- Well, Daddy, you're just in time.
- Really? - Nora's coming.
[rapid breathing] - Okay. All right.
♪ ♪
- Guys, Jay's confirmed it.
The red lightning is gone. The timeline is back to normal.
- Which means the whole "legion of Zoom"
is right back where they belong too.
- And Barry has once again saved the world.
- How are you feeling, Chuck? - Hungry.
But also, totally...
normal!
[both mimic echo] Normal, normal.
- You're good.
- Despite being hit by enough electricity
to kill an entire circus full of elephants,
Runk here doesn't have a scratch on him.
And I think I know why.
Buddy, your blood
is generating Hawking radiation at a molecular level.
- But that's the same kind of energy
that you find inside of black holes.
- So I think that back in the day,
when your consciousness bonded with that black hole...
- What up, party people?
- Some of that cosmic energy bonded right back with you.
- Okay are you saying that I have black hole powers?
Like I'm a meta?
- Technically, your genes do contain
a Consciousness-Honed
Universally Neutralized Kerr anomaly.
- Hold on. I'm a C-H-U-N-K?
- Psh.
- I'm a CHUNK, baby! I'm a CHUNK!
♪ C-H-U-N-K ♪ [gasps]
Oh, dazzling Dwayne McDuffie.
Wait, does this mean I'm gonna be a superhero now?
- Guys, we got to go. Baby's coming.
[soft dramatic music]
♪ ♪
[Joe chuckles]
- How about now?
Your powers picking up our grandbaby?
- No, baby,
not since the last time you asked me like 30 seconds ago.
[Joe laughs]
Hey, at least she's not giving birth
while the Thinker is trying to take over the city.
- That was a hell of a night. - Yup.
- Well, today is pretty weird too.
I mean, I'm about to be born on the other side of that wall.
[Joe chuckles]
[sighs] Shrap.
Am I breaking timeline rules by being here?
- You--a little--
I wasn't gonna say much, but it's fine.
- You're fine. - We fixed it theoretically.
- You're fine.
- Hello, there.
♪ ♪
- You're a Wells. It's nice to meet you.
- It's nice to meet you.
- Did you travel across the cosmos
just to be here for Barry and Iris?
- Not just them.
The Negative Speed Force's threat...
it's gone.
And so it's time for you to ascend...
become the natural order's protector of all things.
♪ ♪
- I have to say goodbye to my family.
I know that's the way of nature.
Fall becomes winter. Winter becomes spring, but...
- But saying good bye is hard.
- Even for a time traveler.
- It's not the time travel that matters.
What matters is carrying a piece
of the ones you love wherever...
and whenever you go.
♪ ♪
- That's it, Iris. You got this.
- [groans]
[Irish shouts]
[baby crying]
- Oh, congratulations.
[swelling orchestral music]
- Oh, my God, she's so beautiful.
Oh! [baby crying]
♪ ♪
- Hi, Nora.
Nice to finally meet you.
♪ ♪
- I remember when you were this small.
Holding you for the first time.
Bringing you home.
Now, look at you.
I'm a granddad and you're a mom.
[Iris sighs]
[Joe sighs]
You're not my baby girl anymore.
- Yes, I am, Dad.
I always will be.
[baby cries] - Oh.
- Oh, here. I'll take her.
- No, no, no. I got her.
[baby crying]
♪ Lay you down now, wonder girl ♪
♪ In your dreams, wonder worlds ♪
♪ ♪
♪ Rest your head for the winder of time ♪
♪ Under moons ♪ - Barry.
- ♪ Kinder eyes ♪
- Wherever you go, you'll always be Barry
and I'll always be Iris.
And we always find each other.
- Iris, you're my lightning rod.
- ♪ Cry, little seed ♪
♪ Little every girl, rest your kinder eyes ♪
- I love you, Barry Allen.
- I love you, Iris West.
- ♪ Your kinder ♪
♪ Eyes ♪
♪ ♪
- I can't believe you're leaving us.
It feels like just yesterday
you were comparing me to a daffodil seed.
- And look how you've blossomed.
- Hey, I will take care of Kesha, Bob, Laverne,
Kalil, Jean-Paul, all of them, I promise.
- And I am sure they will be excellent companions to you
just as they were to me.
[soft dramatic music]
♪ ♪
- Khione, if it wasn't for you last week--
- I did the same thing
any member of Team Flash would have done.
And being a part of everything you've built
over the last nine years,
it's been the honor of a lifetime.
♪ ♪
- You're family now, Khione. You take care of yourself.
- I will.
♪ ♪
- Thank you.
Thank you for never giving up on me.
- Of course.
♪ ♪
- So where you gonna go?
- Once I truly embraced my powers,
I realized something.
Nothing ever dies. We're all connected.
We rise from dirt and we return to dirt.
And that's the natural order of things...
what I was born to protect.
But now, my time in this mortal body is done.
- I'm really gonna miss you.
- Keep flourishing.
♪ ♪
Remember, I will always be with you.
♪ ♪
[soft energetic music]
♪ ♪
- Oh, my God.
Caitlin?
- Hi, guys.
- How?
- When Khione ascended,
she didn't need her physical body anymore.
- So she used her gifts to return Caitlin
to her rightful place. - With her family.
♪ ♪
- I never thought I'd see you again.
- I know, but I'm home again. [sighs]
♪ ♪
[both laugh]
♪ ♪
[upbeat music]
- ♪ Live your life, girl ♪
♪ Ooh, ooh ♪
♪ Love is all we need ♪
- ♪ Love is all we need ♪
♪ Mm, mm, mm ♪
♪ 'Cause everybody needs love ♪
♪ Love is all we need to make everything complete ♪
♪ If we try to live together and be happy ♪
♪ You and me are one and we've only just begun ♪
♪ So let's make a new beginning ♪
- I promise I'll come by Tannhauser as soon as I can.
I love you too, Mom.
No matter how many times I tell her I'm fine,
Carla still wants to run more tests.
- [chuckles] Sounds like somebody's anxious
to get back to Team Flash full time.
It's good. I really missed you.
- We all did.
[soft dramatic music]
Um, Caitlin...
about how we left things...
I'm so sorry. - Don't be.
What you did, it showed me that
Frost's love, her legacy...
I'll carry that with me always.
[chuckles softly]
What I was doing trying to bring Frost back
was just...unnatural.
♪ ♪
- Khione really rubbed off on you, huh?
- Maybe I should die my hair blue.
- [chuckles]
♪ ♪
Come meet Nora. - I can't wait.
[upbeat music]
- Hi.
♪ ♪
- That's a good, little me. [chuckles]
- Okay, even for us, this is trippy.
- I know. Well, I'm just glad you're here.
Both of you.
It's been pretty wild lately.
- You think it was a crazy 24 hours before I was born?
Wait for Bart's due date.
[Nora cooing]
- Great.
[Barry chuckles softly]
- Aw, they love me.
[babbling]
[glass clinking]
- Hey, hey.
[fork clatters] - Ooh!
Whoo. [laughs]
This has been a hell of a week. [laughter]
Not only did I become a grandpa,
our new mother here gave birth to a healthy baby girl.
And she won her first Pulitzer too.
[cheers and applause]
That's two special ladies in my life,
but so the mother of my third special lady
doesn't feel left out-- Cecile?
- Oh. Well.
[soft dramatic music]
- Babe, over the last few years,
I have watched you take on a second career,
become a superhero,
and be the best mother
Jenna could ever have.
And I know that wherever our dreams may take us,
we will always keep loving each other.
Which is why now...
I would like to do this.
♪ ♪
- [gasps]
♪ ♪
Joe, oh, my God.
Are you--are you about to do what I think...
- Mm-hmm. - Wait. Wait.
[Joe laughs]
[laughter]
♪ ♪
[Joe sighs]
- Cecile Horton.
- [high-pitched] Mm-hmm?
[gasps]
[swelling dramatic music]
- [exhales deeply] Will you marry me?
- Yes. - [laughs]
- I mean, finally. Am I right?
[cheers and applause]
♪ ♪
[Nora crying]
- It's okay. I got her.
- I think she likes the sound of your voice.
Maybe try talking to her.
[soft dramatic music]
- Hey.
You want to hear a story?
Okay, but before I start,
I need you to do something first.
I need you to stop crying.
And I need you to believe in the impossible.
Can you do that?
[Nora cooing]
Good.
Your dad is fast.
Faster than the speed of sound.
And the faster I go,
the more the world slows down.
But it wasn't always easy.
When I was a kid,
I lost the people I cared about most.
I won't let that happen to you.
That's why your mom and I,
we need to do something impossible.
♪ ♪
Our family has been blessed with these amazing gifts.
Maybe that speed shouldn't just belong to us anymore.
[swelling orchestral music]
My friend Oliver said that the lightning chose me.
Well, now, I'm gonna do the choosing.
My name's Barry Allen, but their names...
- I just had some car trouble this morning.
♪ ♪
No, I don't own a car.
Yeah, I will be right there. - Are Avery Ho...
[thunder rumbling]
- [exhales deeply] Time to go home.
- Max Mercury...
[engine revving]
[thunder rumbling]
♪ ♪
- Maybe not.
♪ ♪
- Jess Chambers...
[thunder rumbling]
♪ ♪
- Cool.
- Maybe if we share a piece of ourselves,
we can break out of our old cycles of violence and pain.
Create a new world for you, Nora.
A better one.
♪ ♪
One where we can coexist.
All of us.
♪ ♪
Together.
A world where nothing has to be impossible...
♪ ♪
As long as we believe in it.
- Greg, move your head.