Theo and Stiles in “Unfinished Business”

Theo

[about Parrish] Lydia figured it out. I saw it in her memories.

Stiles

Right after you drove her out of her mind.

Theo

[shrugs] Collateral damage. But, if she's right about Parrish, then things around here are gonna get a lot worse.

Stiles

[scoffs] I don't care.

Theo

You should. Because if your dad does survive, he's not gonna be Sheriff of anything much longer.