Castle, Season 4

[After listening to the 911 phone recording]

Castle:
Now, Charlie made this 911 call moments after the attack. Does it sound like he's faking to you?

Beckett:
It sounds like Charlie's having a psychotic break. What if his guilt made him snap and he created a fantasy in which zombies killed David and not him?

Castle:
I'm not so sure. I mean, his voice does have that authentic ring of pants-wetting terror.

Beckett:
You do not believe in Charlie's story.

Castle:
I believe he believes it.

Beckett:
Okay, well, whatever you believe, all evidence points to the fact that Charlie Coleman is our killer.

Esposito:
Maybe not all the evidence. CSU analyzed that bite mark on Charlie's arm. Turns out that it matches the bite mark on our victim.

Beckett:
Maybe Charlie bit David and then he bit himself?

Esposito:
Well, I was thinking the same thing, but CSU also says that the bite marks weren't made by Charlie's teeth.

Castle:
Oh, wait, um… Sorry. Let me make sure I understand so that I might properly relish this moment. You're saying the evidence shows that Charlie and the victim both were bitten by an as yet unknown third party?

Esposito:
That's what I just said-

Castle:
Perhaps even a mindless, shuffling undead third party?

Beckett:
Castle, just stop. There's no such thing as a zombie.