An infinite number of Harrison Wells and we are stuck with the one that destroyed the multiverse.

Cisco

My brain is the Ryan Gosling of intellects.

Red flag city.

Ralph: You know it’s pronounced yaat not yacht.
Cisco: God I missed you.

Nora sometimes we fail because all we can worry about is not failing.

Wow, it smells like...science in here.

Cisco: Iris West-Allen, I know badassery when I see it. And that was raw, unrefined, cage-free, non-GMO badassery.
Caitlin: You dove off a building!
Barry: To save me!
Iris: Yeah, I guess I kinda did.

Sherlock: Took me about 18 hours since I'm only kind of excellent at algebra.
Cisco: You know this is calculus, right?
Ralph: Calcula, Algebra, none of this is going to help find Caitlins dad!

Cisco: If you're looking for cooperation trust me this is not your guy. He is just an asshat.
Iris: That was way harsh, Cisco.
Cisco: I'm sorry, I'm being harsh?
Iris: Yes
Cisco: Go ahead, call him. See if you don't get a steaming pile of side eye.

Barry: Okay there's no telling the ripple effect of this change or the future Nora's going to return to. We gotta catch this guy fast.
Cisco: You mean catch the guy future us can't catch? Right. I thought beating The Thinker was hard.

Cisco: Thanks Fangirl, you saved my life.
Nora: I did good?
Barry: You did great.

Ah yes, gigantic sugary pastry. I think as far as avoiding your feelings goes, cinnamon bun was a solid choice.

The Flash Quotes

Barry: Nora wait what are you doing?! You can't touch that, you'll contaminate the evidence!
Nora: Sorry, you mean you don't have a scene wide modified bi-sonic frequency field to avoid cross contamination?
Barry: I don't even think we have some of those WORDS yet!

Jesse: When I first got my power, you were so lost not having yours. I thought maybe part of the reason why you liked me was because you were attracted to the speed and not me.
Wally: [scoffs]
Jesse: I know, I know. But I saw you out there today. Being Kid Flash. You were complete, Wally. You were scary complete.
Wally: I could have all the speed in the world. I'm not complete without you.