Jack couldn't help it; the incredulous look on his face. He turned his head to the Doctor, both eyebrows raised slightly.

"Yeah," he said, "sure, some things do." But he didn't press on it, there was hardly any point. It was though, a small reminder. The Master, somewhere, was still out there.

"You think everything is your fault," Jack said idly as they continued to walk. "But it's not," he added before turning his head to the Doctor's, and despite his words, smiling, "Some of it's mine."