The Doctor in many ways was a genius, but this world was out of even his realm of knowledge. It was not a version of the Earth he'd been to. At least he was fairly sure it wasn't. Everything was different. There was an apocalypse, a battle between hell and heaven. The Earth he knew of the battle was between space and world of humans. This world had yet to even really reach the stars. They had space programs, sure but they hadn't pushed the boundaries. It was almost cute. And yet, he felt for them. He always had a soft spot for humanity for the exact reason Martha stated. They were so curious. So not unlike him, he could connect with them.
They didn't want to rule the world-well most of them didn't anyway. There were a few now and then who wanted the world and the universe, but generally speaking he could see the planets true potential. It's true beauty through them. "I should hope not. I'd be concerned for your future if you could. Nothing in the world like experiencing. It isn't always easy but I wouldn't trade it for anything. " That wasn't entirely true, they both knew if there was a way he could have saved his people he probably would have tried. However even the Doctor knew that simply wasn't possible.
He gave her a grin that was slightly less manic than before, a bit sad really. He didn't entirely grasp this cage thing. It felt like they were dead and gone, but she insisted they weren't. He liked her version better than the worst things that played out in his, but it still worried him. He dangled his feet over the edge of the walk ramp idly and finished his sandwich.
"Right. Course we will." He tried to sound reassuring. That was reassuring wasn't it?