Dr. Harrison Wells : What? No Big Belly Burger? It's one of the few perks of living in this time. We're out of cows where I come from. You don't care about that. You have questions. Go ahead.
Barry Allen : I'm not sure where to start... Thawne. That is your real name - Eobard Thawne?
Dr. Harrison Wells : Since the day I was born.
Barry Allen : And when was that?
Dr. Harrison Wells : 136 years from now. This's not what you wanna know. Go ahead, Barry. Ask it.
Barry Allen : Why did you kill my mother?
Dr. Harrison Wells : Because I hate you. Not you now. You years from now.
Barry Allen : In the future.
Dr. Harrison Wells : In a future. Yes. We're enemies, rivals, opposites, reverses of one another.
Barry Allen : Why? Wh-why were we enemies?
Dr. Harrison Wells : It doesn't matter. It doesn't... matter anymore. What matters is that neither of us was strong enough to defeat the other... until I learned your secret. I learned your name, "Barry Allen," and finally I knew how to defeat you once and for all - travel back in time, kill you as a child, wipe you from the face of the earth - but then you - future you, that is - followed me back and we fought. We both landed some pretty solid shots; and then, you - future you - got your younger self out of there. I was so mad, but then I thought... what if you were to suffer a tragedy? What if you were to suffer something so horrible, so traumatic that your child self could never recover? Then you would not become The Flash. And so I stabbed your mother in the heart, and I was free, finally able to return to a future without The Flash, only to realize that in traveling back I'd lost my way home, lost my ability to harness the speed force, and without it, I was stuck here, stranded in this time, unable to return to my own, and the only way back was The Flash - but The Flash was gone, and so I created him.
Barry Allen : Why train me? Why help me save so many people?
Dr. Harrison Wells : Because I needed you to get fast. Fast enough to rupture the space-time barrier and create a stable wormhole through which I could return home.
Barry Allen : Why would I ever do that?
Dr. Harrison Wells : Because, Barry Allen, if you give me what I want, I'm gonna give you what you want. You can go back and save your mother. You can prevent your father from going to prison. You can reunite the Allen family.
Barry Allen : No. No, I don't believe you. I want to kill you right now.
Dr. Harrison Wells : I know that rage. I used to feel that rage every time I looked upon you. And now, somehow, I know what Joe and Henry feel when they look on you with pride. With love.
Barry Allen : No. No. Don't you ever say that to me!
Dr. Harrison Wells : I know you're upset, but I'm giving you a chance. I'm giving you a chance to undo all the evil I've done. Don't you want that chance?
Dr. Harrison Wells : [looking at the Time Sphere] It's beautiful. Rip Hunter would be impressed. He built the first one of these. Interesting man.
[the wormhole spits out a silver helmet with gold wings]
Joe West : Now what the hell is that?
Dr. Harrison Wells : That's my cue to leave. Thank you, Cisco.
Cisco Ramon : Don't ever come back.
Reverse-Flash : Just so we're clear, after I kill you, I'm going to kill them, and then I'm going to kill your father. I always win, Flash.
[gunshot fires, Eddie has shot himself]
Iris West : Aagh! Eddie! Oh, my... !
Joe West : Eddie! What did you do? What did you do? What did you do?
Eddie Thawne : No such thing as a coincidence.
Barry Allen : What's happening?
Reverse-Flash : [dissolving] Cisco, help me.
Cisco Ramon : Eddie's his ancestor. If Eddie dies, he'll never been born, and... He's being erased from existence.
Barry Allen : So, how does this work? Your grand plan?
Dr. Harrison Wells : Well, actually it's not that grand at all, Barry. In fact it's rather simple. We use the particle accelerator.
Barry Allen : [Nervously chuckles] The particle accel... The last time that happened, you caused an explosion that hurt alot of people.
Dr. Harrison Wells : This time, the accelerator will operate exactly the way it was designed to. Except, instead of two particles moving in opposite directions, colliding at the speed of light in the inner ring, we're only going to inject one particle, into the accelerator.
Barry Allen : And I'm what it collides with.
Dr. Harrison Wells : And if you can go fast enough, Barry, if you can HIT that particle with enough speed, you will punch a hole right through the fabric of reality. And you will create a portal connecting this time, to infinite times.
Barry Allen : A wormhole.
Dr. Harrison Wells : Through which one might travel back to the past, say, to the night your mother died, or forward to the future, to say, my time.
Barry Allen : You said if, I run fast enough. What happens if I don't?
Dr. Harrison Wells : If you don't achieve the desired velocity, Barry, you'll die.