"I'm not tired," Jack said, shaking his head. It was a lie. He'd died and that always wore him out. That and he was emotionally raw. But he didn't want to leave the Doctor to himself. Not now.

He wanted to ask the Doctor what he was thinking, but it felt too invasive. Silly, perhaps, given if the channels were open he could feel what he was thinking.

"Do you need sleep?" he asked him. "You've not been back very long. And it didn't quite... well, go to plan. We should give you the once over."