Jack left, and the door was shut behind him immediately. The Doctor wanted to comfort him, but had nothing to give. He didn't know what had happened with this woman, he didn't know why she mattered.

"Don't blame him for anything I've done," he said. "Neither of us know what went on between you and me."

He turned back to the woman and tried, desperately, to pull her into his memory. There were so many big, gaping holes during the two hundred years he was away from Jack. She must've fit somewhere in there, like a peg into a children's toy.

"Tell me what happened," he said.