The Doctor woke only a few short hours later and found himself positively disappointed at his lack of dreams. He'd spent years asleep without dreams, and now, when he really wanted them, he still had nothing. No memories, no twisting nightmares, not even a good brain-dump of nonsensical mental garbage. Just nothing. He was asleep next to Jack on the bed, and then he was awake.
He sighed. His memory was still swiss-cheesed with missing parts of the last two hundred years, but there seemed to be more gaps filled in. And that was something, wasn't it? It meant maybe a few more nights of dreamless sleep and he'd be back to himself completely.
He just hoped there weren't more memories like Mars to discover.
He looked over to Jack, asleep next to him. This was what Jack loved the most, he said. Not sleeping alone. Not being alone. In that instant, the Doctor understood it.