Dexter: I am a father, a son, a serial killer.
Get Gellar - S6-E9
Dexter Morgan: Are you okay?
Debra Morgan: Yeah, I just threw away a pair of shoes because they're full of blood, but I'm great.
Dexter: 'Cause I'm here if you need a chair.
Debra: What?
Dexter: What you said before. I'm a chair.
Debra: Yeah, but I don't want a chair. I want a table.
Dexter: Deb, what are you even saying?
[MC Hammer's "U Can't Touch This" playing.]
Former Classmate: Come on, Dexter. It's hammer time.
Dexter: [internally] I have no idea what hammer time is. Or how it differs from regular time.
Isaak Sirko: You didn't kill Victor out of vengeance. I have a feeling you're a different kind of animal. The question is...what kind are you, Dexter Morgan?
Dexter: The kind who hunted your friend down and strapped him to a board and put a plastic bag on his head and crushed his skull with a fire extinguisher. The kind who's gonna do the same thing to you, give or take the fire extinguisher.
Answer: No, Harry is not the real father. While he did have an affair with Dexter's biological mother (Laura Moser), this was when she was his C.I. Dexter was already born at that point.