Terminator: The Sarah Connor Chronicles, Season 2

[Cameron works on a pocket watch]

John Connor:
[Walks in] I can't find her.

Cameron:
She's out there. She'll call you eventually. She always does.

John Connor:
Cameron, did you --

Cameron:
You know I didn't.

John Connor:
What have you been doing? You've been out here for hours.

Cameron:
[Turns to face him, holding the pocket watch] Making something for you. [Hands him the watch]

John Connor:
What is it?

Cameron:
You've tried to fix me. Twice now. It's not working.

John Connor:
And?

Cameron:
I'm not capable of self termination.

John Connor:
Suicide?

Cameron:
I can't kill myself, but you can.

John Connor:
Why would I want to kill you?

Cameron:
You might have to some day. [Watches as John opens the watch, which contains three buttons rather than clock pieces] I've planted an explosive in my skull near my chip. It's a small amount, but it's enough.

John Connor:
Enough?

Cameron:
[Puts the watch around John's neck] All you have to do is hit the switch.

John Connor:
What would future John do now?

Cameron:
Future John doesn't live here. You do.

John Connor:
[Puts the watch beneath his shirt]