Dexter, Season 8

Dr. Vogel:
Well, we're never gonna get anywhere unless one of you starts talking.

[Dexter and Debra remain silent]

Dr. Vogel:
Okay...Debra, it seems that you tried to kill Dexter as well as yourself.

Debra:
Yes, but then I saved him.

Dexter:
You saved me? You only had to save me because you tried to kill me!

Debra:
I know, but-

Dexter:
You almost left my son an orphan. Harrison. Who's gonna take care of him!? Who!?

Debra:
...I don't know.

Dexter:
All I've done my whole life is try to take care of you, to protect you.

Debra:
Protect!? Jesus Christ, Dexter! If this is your way of protecting me-

Dexter:
Okay, so I'm not perfect! You think it's easy being your brother!?

Debra:
You're not even listening to me. You don't understand. I've been trapped in a fucking fog-

Dexter:
No, I don't understand! Haven't you heard anything she said?! I'm stupid that way. My brain is limited. So when my sister tries to kill me, for some reason, it doesn't make sense!

Dr. Vogel:
It's true, Dexter, what she said. While in the throes of PTSD, one's thinking becomes cloudy. The weight of what she has been through has been too much for her to bear. Debra has been in such a turmoil that she sought out the first solution that presented itself.

Debra:
I had just found out that Dad killed himself because of you. Because of what you are. I was fucking traumatized by all this shit!

Dexter:
[sarcastically] Yeah, so try to kill us both. That solves everything.

Dr. Vogel:
You are overlooking an important part of what happened, Dexter. Yes, she tried to kill you, the both of you. And that was Debra hitting rock bottom. But ultimately, as she said, she saved you. And that was Debra's first step toward recovery. You should see that as a promising sign for your sister.

Dexter:
Great. [to Debra] I'm so fucking happy for you.