Depois que ele ouve seu fantasma aparecer, a seguinte discussão acontece:
Doctor: It means I die.
Clara: No - not necessarily. We can change the sequence of events so...
Doctor: This isn't a potential future, this is the future now. It's already happened. The proof is right there in front of you. I have to die.
Clara: No. You can change things.
Doctor: I can't. Even the tiniest change, the ramifications could be catastrophic. It could spread carnage and chaos across the universe like ripples on a pond. Ah, well, I've had a good innings. This regeneration is a bit of a clerical error anyway.
Esta é uma referência a todo o alarido sobre a geração em que ele está .