Jack listened and he felt a sharp pang of jealousy. He wanted to be there for that. For those random trips that took them anywhere, for getting into trouble that they shouldn't. It should have been the both of them. He looked up at the TARDIS as the Doctor spoke of her and he thought he'd miss her too. Three weeks was nothing though, not really.

"But you won't forget, right?" he questioned, worried that he might. "You'll remember to come back for me?"

Jack had had experience in the past of being left by the Doctor. Things may have changed, but well, old habits died hard.

"That is-- I mean, you do want to, yeah?"

Why was he so worried? He wasn't sure. But worried he was. Worried for many reasons.