HELEN: I do love your positive attitude. Look at The Eleven. After everything he’s done you still hope for the best.

DOCTOR: Hope is always a good thing. Sometimes it’s been the only thing that’s kept me going.

HELEN: Still, doesn’t the universe tend to let you down?

DOCTOR: You can keep hoping that it won’t.

HELEN: Really Doctor, I don’t know how you’ve survived this long.

DOCTOR: To be honest, I haven’t. Technically I’ve died more than half a dozen times, but I keep on trying.