The Doctor didn't even remotely buy it. He'd used that falseness far too often to think Jack was perfectly all right. He knew he certainly wasn't. But he couldn't just go back on his condemnation of Jack. He couldn't. He had to stick to what he said. He traveled alone.

"Worry about it later," he said, patting Jack's shoulder. "You need the rest."

He scooted forward on the cave floor so he could stretch back, resting his head on his hand. Maybe feigning an interest in sleeping himself would make Jack rest.