The Doctor saw the blush and grinned, eyes twinkling. "Ah. You didn't... talk much, eh? Nothing to be ashamed of, I've done some not-talking with a couple of Jacks since I've been here!" He sipped at his drink. "Jack wouldn't be able to help much with dimension-slipping, though, I wouldn't think. Time-travelling's more his thing. Well, apart from the not-dying thing."