Michelle and The Doctor (Ten)
"You've got it," he said, offering her a small smile. "I know there are others here that do the same -- or, at least, I've heard. But Jack is from my world. Not Gallifrey -- but..." he sighed softly. "The same idea of a world, anyway. He lived in Wales." He knew that much hadn't been obvious, either, as Jack sounded American and not Welsh. Which was why Ten had chosen to say lived in Wales instead of from Wales.
He honestly had no idea where Jack was from, originally. Oh, right. The Boeshane Peninsula.
Not that Michelle would know where that was.
"Two hearts. They both work, and are both active."