Jack frowned, reaching out for the Doctor, resting his hand on his shoulder. "You took a while, but you did come back. Not quite a hundred and fifty years for me, but you came back, and you didn't run again. I could have looked harder for you, and probably could have found you - one way or another. And you'd have resented me, and run further, and I'm glad I didn't." He grinned, ruffling the Doctor's hair. "Besides, I have all the time in the world to wait for you to get back."