Hiro: Now you know what it's like to be killed by your best friend.
Ando: Okay, now we're even.

Hiro: We are badasses now.
Ando: Yes, we are very badass.

Hiro: We are searching for a formula that...
Adam: A formula? I knew it'd come back to bite them in the ass one day. Even I told them to destroy it.
Ando: So you know who would steal it?
Adam: Maybe... If I tell you, what's in it for me?
Hiro: When we have finished our mission, I promise to put you in a most spacious cell.
Ando: With a window!
Hiro: And a vent.
Adam: Forget it.
Hiro: Okay, back you go (Squeezes eyes to bend time)
Adam: Wait! (frustrated) You little Japanese Nazi! Let me think! Let's see, off the top of my head, I'd say your villain is Angela Petrelli.
Hiro: She's the one who asked us to find the formula.
Adam: I see. Well then, I'm fresh out of ideas.

Hiro: What are you doing?
Ando: I'm being awesome!

Linderman: So, Nathan, are the rumors true?
Nathan: Excuse me?
Linderman: I heard your office is about to launch a full-scale investigation into all things Linderman. Care to comment?
Nathan: I'd shave my wrists. Handcuffs chafe.

Lyle: The bitch is back. (reference to Veronica Mars finale.)

Matt: High five, turtle

Matt: Your cell. I gotta use your cell, I gotta call home.
Usutu: No service here. Should have gone with Sprint.

Meredith: All right, we'll start at the beginning. Survival.
Claire: I've already mastered survival. I need to learn how to fight.
Meredith: There are some things you can't fight, Claire. [manifests her power and begins heating up the metal box]

Meredith: They're trickin' you because you're dumb! You know what Daddy used to say; "God gave you a big sister instead of a brain".

Millie: [to Angela] You look like you were mugged and the first thing they took was your dignity.

Mohinder Suresh: [ending voiceover] There is good, and there is evil. Right, and wrong. Heroes and villains. And if we are blessed with wisdom, then there are glimpses between the cracks of each where light streams through. We wait in silence for these times, when sense can be made. When meaningless existence comes into focus, and our purpose presents itself. And if we have the strength to be honest, and what we find there, staring back at us, is our own reflection. Bearing witness to the duality of life. And each one of us is capable of both the dark, and the light.. the good and evil, of either, of all. And destiny, while marching ever in our direction can be rerouted by the choices we make. By the love we hold on to, and the promises we keep.

Mohinder : [ending voiceover] Generations unfold -- father to son, mother to daughter. Where one leaves off, the other follows, destined to repeat each other's mistakes, each other's triumphs. For how do we see the world if not through their lens? The same fears, the same desires? Do we see them as an example to follow, or as a warning of what to avoid? Choosing to live as they have, simply because it's what we know, or driven to create one's own identity? And what happens when we find them to be a disappointment? Can we replace them? Our mothers, our fathers? Or will destiny find a way to drive us back? Back to the familiar comforts of home?

Mohinder: There is a moment in every war where everything changes. A moment when the road bends. Alliances and battle lines shift. And the rules of engagement are rewritten. Moments like these can change the nature of the battle, and turn the tide for either side. So we do what we can to understand them. To be ready for change, we steady our hearts, curb our fears, muster our forces, and look for signs in the stars. But these moments, these game changers, remain a mystery. Destiny's invisible hand, moving pieces on a chessboard. No matter how much we prepare for them - how much we resist the change, anticipate the moment, fight the inevitable outcome - in the end, we are never truly ready when it strikes.

Mohinder: [ending voiceover] We are all connected. Joined together by an invisible thread, infinite in its potential and fragile in its design. Yet while connected, we are also merely individuals. Empty vessels to be filled with infinite possibilities. An assortment of thoughts, beliefs. A collection of disjointed memories and experiences. Can I be me without this? Can you be you? And if this invisible thread that holds us together were to sever, to cease, what then? What would become of billions of lone, disconnected souls? Therein lies the great quest of our lives. To find. To connect. To hold on. For when our hearts are pure, and our thoughts in line, we are all truly one. Capable of repairing our fragile world, and creating a universe of infinite possibilities.
Season 4 (Volume 5: Redemption)