There are a few to whom The Master grants greater power. They retain parts of their former selves.

Setrakian

They're connected to The Master who sees through every strigoi eye.

Setrakian

Vasiliy: I need the rules. What kills these things aside from direct sunlight?
Setrakian: Brainstem must be destroyed or severed from the spinal cord.

Tunnels are the perfect ecology for them, aren't they? Dank, dark, devoid of sunlight.

Nora

Be quiet. Do not touch her. She is corrupted.

Hooded Strigoi

Palmer: You assured me you had this fellow under control.
Eichhorst: It's a bluff. Kent would never have the courage to try this on his own. The Jew is behind it.
Palmer: I thought you were going to deal with him.
Eichhorst: He has more tenacity than I thought.

We kill The Master and his spawn will die. I promise you.

Setrakian

Kelly: What should we do Z? Stay or go?
Zack: Dad says go.

I'm your salvation or your downfall.

Eichhorst

I have video documenting the physical effects of this infection. I also have video of an infected person in the full throes of the illness. Everett this is moving fast.

Eph

My bubbeh told me stories when I was a child. Stories about a monster who fed on the blood of men.

Young Abraham

Nora: What have you done?
Setrakian: Among other things, I just saved your life.
Nora: We have resources, protocols.
Setrakian: Not for this. There's no other way.

The Strain Quotes

Love is going to guide them all back. To their homes. To their loved ones.

Eichhorst

He's back. I don't know if I have the strength to do it all over again.

Setrakian