Debra Morgan is Dexter's step-sister.

They became related when Dexter was adopted by Deb's father, Harry, who instantly developed a bond with his new son. Deb grew of very jealous of it.

Debra is a detective in the Miami Police Department. At one point, she got engaged to a man that ended up being the notorious murderer known as The Ice Truck Killer. That's never fun.

This detective as a seriously dirty mouth and a very aggressive, up-front attitude. She's far from shy.

Debra Morgan Quotes

Debra Morgan: Why is it we never talk brother-sister stuff?
Dexter Morgan: Our dad was a cop, you're a cop, I work for the cops... for us, this is brother-sister stuff.

Dexter Morgan: So what's up, hot shot?
Debra Morgan: Alright, get this. Lieutenant's looking for that refrigerated truck in every swamp, glade and chop shop from here to the Keys. The way I see it, that whack-job truck driver threw a severed head at your car. It's not as if he's shy.
Dexter Morgan: You think he's hiding the truck in plain sight, wanting it to be found?

Dexter Quotes

There are no secrets in life, just hidden truths that lie beneath the surface.

Dexter Morgan

I've lived in darkness a long time. Over the years, my eyes adjusted until the dark became my world and I could see. But then Rudy turned on the light. He flooded my memory and now I'm blind.

Dexter Morgan