As the Doctor slumped forward Jack felt the automatic worry that he'd only expect to feel for someone he cared about. He didn't care about the Doctor, not really. He made a point of not caring for people easily any more. It was better that way.

But still, he reached his arm forward and touched his fingers gently to the other man's back. "You good?" he asked before patting his back gently and moving his hand away.

"Come on," he said, tone a little more gentle than that which he'd been using so far. "We'll get in there, work it out. Maybe get something to eat too." He wasn't sure how long it had been since he'd eaten, but by the way his stomach twisted, he guessed it had been a while. That and the Doctor obviously needed to.

"So you're quite the technological hack then, I take it?" he asked, walking down the hill towards the building.