NYSSA: He took my hands and he kissed my forehead. Then he started to walk forward towards the white figure. He turned back once and looked around, and somehow he found where all of us were looking at him.

DOCTOR: Thank you, all of you. Goodbye.

NYSSA: He said. And then he started to run with determination, without a hint of reluctance, because he still had things to do. He had someone to save back in the real world. He had a whole other self that he had to be to do that. He ran right into the white figure of the Watcher and he fell, fell into the figure, spiralling down until he was lost in the distance. I suppose if I never meet him again and grow old myself, I'll have to say that was the last time I saw him, in a dream. But without evidence, I'll say to people that I know he's still alive, somewhere out there. I'll know he's still travelling. I'll know that he's still having adventures. I'll know he always will be.