Lt. Hammond: Seeing as helping you will undoubtedly lead to court-martial, I'd like to know why I would do that.
Sam: Because it's your idea.
Jack: Albeit one you won't have for 30 years.
Lt. Hammond: What?
Sam: I know this is kind of hard to understand, but that's roughly how far back in time we've traveled.
Lt. Hammond: (smiling) I'm sorry. I can't help you.