Hawaii Five-0, Season 4

[Catherine has told Steve she's staying in Afghanistan to find Najib]

Steve McGarrett:
I'm gonna come back, all right? I'm gonna come back. We can do this together. I'll help you find him.

Catherine Rollins:
Steve, no.

Steve McGarrett:
Catherine...

Catherine:
No, listen to me. You've helped me enough, okay? It's better for me to do this alone. I can keep a low profile that way. It's just easier. You know I'm right. You understand why I need to do this, don't you?

Steve:
[sniffles] Yeah, of course I do. You just promise me...

Catherine:
I promise you I'll be careful. I'll be careful, okay?

Steve:
I love you, you know.

Catherine:
I love you, too.

Steve:
Okay.

Catherine:
All right.

Steve:
Good luck, Cath.