Jack let out a half laugh. "Careful," he said, "that's very nearly sentimental. But it's not all so bad. This planet, this city. Someone has to look after them, and the Doctor isn't always around to do it. And you don't think I should be trapped here? Might want to tell him that, considering he's so intent on breaking this damn thing and keeping me stuck here."

Ahead of them was a box secured with a key, and he pulled a bunch out from his pocket to unlatch it. Inside was an access panel to the central matrix of the computer system.

"Would you?" he asked with his own voice quiet, concealing emotion as best he could. "Wouldn't be here at all if it wasn't for you, I suppose. You and Rose. I'd have stayed dead on Satellite Five. Funny, you know I don't think I'd ever thought about it like that."