Chuck: Oh, oh, are we really doing this I mean, spying on our own partner? Isn't that a little icky?
Sarah: Well, think about it. If Casey is going out on missions without us, then he is doing so without the Intersect.
Chuck: You're right. What if he gets in a jam? What if he needs our help?
Sarah: I mean, we're not spying on Casey. We're watching his back.