Bones, Season 4

Brennan:
So, um, do you... do you really think you have to be bad to be good?

Booth:
Yeah, I do.

Brennan:
Well, I've never done anything "bad".

Booth:
[nods] I believe you.

Brennan:
I mean, I've made mistakes, of course, but I've never purposely done anything bad.

Booth:
And I believe you.

Brennan:
I don't want my frontal lobe to be a dried-up raisin.

Booth:
[smiles in bemusement, grins and turns to Brennan] You know what, we're gonna do something bad now.

Brennan:
[mischievously] What?

Booth:
[grins] Have you ever dined and dashed? You know the concept, right? We're gonna run outta here without paying the bill.

Brennan:
No, that's stealing.

Booth:
That's why they call it bad. Are you ready...

Brennan:
No I can't...really? No....are you serious??? [grins excitedly as Booth prepares to run] Oh my god!