He [The Doctor] thinks I take him where he wants to go. But. I'll let you into a secret, shall I?

I take him where he needs to be. Which is sometimes also where he wants to be. But not always.

London 1965, for instance. I could have got there in a second. If only he'd asked nicely. If only he hadn't been having fun. If only he hadn't been learning a lesson. About who he really needed to be, not who he wanted to be. But there we go – the old man had run away from his people intent on being a wanderer and never interfering. Instead those two schoolteachers taught him more about himself than he'd have learned in a thousand years of walking alone in eternity.