JT: What happened to this guy wasn't caused by that serum. [pointing to the side by side blood samples] That's the result of a blood borne parasite.
Cat: A parasite? Like a bug? So he caught this like a cold?
JT: Well, I don't know exactly how it got transmitted, but it did. And this parasite's fast acting too, which means he had to contracted it a day or two ago, at most.

[talking about the aunts] I don't know what you issue is Cat, but they're here to see you! So you better get in here and deal with them or I swear I'll tell them you're engaged to a beast.

Heather

Why change to this outbreak approach? What are they trying to accomplish?

Cat

[talking to Vincent about the outbreak] Whoever these guys are, are using the same mutation that made you, you.

JT

You have enough secrets Cat, being mad at your mom shouldn't be one of them.

Tess

Cat: Do you realize what you just did?
Vincent: Yeah, I just stopped us from ruining what should have been the best day of our lives.
Cat: No, you maybe have just ruined our best chance to find out who's behind all this and for what, because you don't want to elope.
Vincent: Yes that is exactly why I did it.
Cat: Vincent we were never really going to do that.
Vincent: Yes we were. Maybe not technically, but we were about to recite vows Catherine.
Cat: So what if we did? What difference does it make? It's just a piece of paper.
Vincent: No, no it's not.

JT: What did I do?
Tess: JT, this is not the time, OK.
JT: But I don't know what I did wrong.
Tess: You weren't there for me JT. I just wanted you to care about what I was going through and you didn't.
JT: Because I was trying to save Vincent. What was I supposed to do?
Tess: You were supposed to be there for me too. Did Vincent put his relationship on hold with Cat when you needed saving? No. He never does.

Vincent: You're saying we keep this from Catherine?
Tess: Yeah I am. At least until after the wedding, which is what, ten, eleven hours from now? Why ruin it for her? Why ruin it for you?
JT: It's your call big guy.
Vincent: Catherine is gonna kill me if she finds out about this and blows up in her face, right?

You can't just shoot people at weddings!

Heather

Vincent: We gotta stop this guy Liam first.
Cat: OK we are not stopping Liam.
Vincent: We got to. We got to at least try, Catherine.
Cat: You don't understand. I am done Vincent. I am not doing this anymore.
Vincent: What do you mean?
Cat: I don't even know what I was thinking. This is never ending and it just keeps getting worse. Liam could have easily killed us today. So why are we going after him when he's not even coming after us? Why should we have to keep risking our lives, our friends lives, Heather's? Who says this has to be our fight? It's not. It's over, I quit.

Cat: What are you doing here? Why would you want to steal Julianna's body?
Vincent: I didn't try to steal Julianna's body. I was just trying to track Liam off of it. Anyway, look, it's a good thing I came.
Cat: No it is not a good thing. This is a police case, I told you, one that I am handling.

[talking to a shocked Vincent] Don't make me arrest you honey.

Cat

Beauty and the Beast Quotes

Vargas:This is where he lives? A chemical plant?
Cat: He's a researcher, maybe he works from home?
Vargas: Or maybe it's a meth lab.
Cat: Just my type.

Everyone told me it was just a coyote or a bear. This thing I thought I had seen was just a result of my concussion or post traumatic stress. No, the men who killed my mother were beasts. I believed them. Until now.

Cat