The Doctor's eyebrows hit his hairline, and a huge grin broke out on his face. Oh, the sheer number of laws of time and space they were breaking was astronomical, but it was absolutely brilliant. Little Jack Harkness, arm in a cast, walking about on his home world. How different he looked to the adult next to him, the one who was so close to death the night before.

He wondered what the little boy had planned for his future, how he expected his life to turn out.

"Ah, little Skye," the Doctor cooed to Jack. "Little ball and all. One day, the fact that'll alter the universe." Though, even now, he could see the future moving and rippling around the boy as he moved, Jack's fixed state drifting back along his own timeline.

He raised his eyebrow at the woman. "That your mum?"