Caitlin: I think I can stabilize his cells if I had a sample of his DNA from prior of when he was exposed to the dark matter.
Barry: Why? So he can go out and start hurting people like our other friends here? I think we should lock him up in the pipeline.
Caitlin: He hasn't done anything!
Barry: Yet, trust me. I know this guy, he is a bad guy.
Caitlin: Barry, I took an oath to help people. I'm a doctor, I can't just leave him there to be like spaghetti.

Breacher: Ten.
Cisco: Oh I could have sworn you said you were going to hunt me! Like a deer?
Breacher: You'll be easy prey. Nine.
Cisco: Listen, I've tried to be polite with you but this is going a little bit too far. I get that you're overprotective...
Breacher: Eight.
Cisco: Are you counting?!
Breacher: In the next 24 hours, I'll be hunting you throughout this city. We do not use our powers. When it's over, my daughter will be free of you. Seven.
Cisco: Do you do this with all of her boyfriends?
Breacher: I hunted her last one, yes.
Cisco: Where is he now?
Breacher: I don't know.
Cisco: He got away?
Breacher: I don't know where you go when you die. Five.
Cisco: You just skipped six!
Breacher: I know! Four. Don't try to breach, I will know it when you do. You can't hide from me Cisco. If I were you, I would start running, Cisci! Three, two, one!

Ralph: Do I get a cool superhero name?
Barry: What do you think about...Plastic Man?
Ralph: I think that is the dumbest name I have ever heard.
Barry: Yeah, Cisco comes up with the names.

Joe: That guy has not changed a bit.
Barry: Really, did you expect him to?
Joe: [Sees Ralph's stretch] Guess he was on that bus.

The Flash Season 4 Episode 4 Quotes

Joe: That guy has not changed a bit.
Barry: Really, did you expect him to?
Joe: [Sees Ralph's stretch] Guess he was on that bus.

Ralph: Do I get a cool superhero name?
Barry: What do you think about...Plastic Man?
Ralph: I think that is the dumbest name I have ever heard.
Barry: Yeah, Cisco comes up with the names.