The Doctor had had a granddaughter? It was so hard to see the Doctor for the age he really was and not the age he looked, and that perhaps it was one of the older Doctors.. one of the many faces he'd had. Jack understood about family, about abandoning. He turned his hand to hold the Doctor's, looking sad right along with him.

"I've got a grandson too. Sweet, smart boy. He's called Steven. Only, he doesn't know I'm his granddad. He thinks I'm his uncle. My daughter's brother." He laughed a little. "Not sure when he'll catch on... Maybe when his mum's gone grey and he's finished uni." He'd gotten off track.

Jack shook his head, determined to bring the conversation back around. "I understand. You want to do right by him. You feel guilty about abandoning him. Can't say I blame you, really.You want to save him... But Doctor, I'm not sure he can be."