Season 1 Episode 11 Undercover
"You know the line we talked about? You know the line we have to draw because we see things people are hiding, things they don't want us to know? I think we should respect the line, I think is best for both of us" Foster said and smiled, yet a very sad smile
Lightman looked at her and saw her struggling.
"I can't respect your line when you're clearly hurting"
"I need to do this on my own, Cal. And I don't want to waste my energy trying to hide it from you because you step your boundaries. Don't protect me and don't help me this time, I need to go through it on my own and make my own choices and I need you to let me!"
"You're pissed off at me" Lightman said and continued to look at her. Her face was so expressive and she made no effort to hide it, even if her tone was calm.
"Have it your way luv, but 'm here for you if..."
"Good night Cal" Foster interrupted him.
"Good night luv" he understood it wasn't any point in pushing once she had made up her mind.