[After listening, the Doctor raises a hand to puts his finger to his lips and states] Finger to lips!
Do not put words in my mouth, do you understand me? The only thing River told me- the only way she got me to trust her was by telling me something only one person in the entire universe could know, and only by one way.
Therefore, if you're her child, then I can't question you.
[With an annoyed look, the Doctor runs his hands over his own hair, leaving it a mess] Let's go, then. If you need to get back to your own time. I don't want to know how you got misplaced. I'm just going to put you back and pretend like I never saw anything. You never mention another word of this to anyone. Understood? It's critical.
Besides, I already had an echo. Jenny. I'm sure you must know about her, then. But she died, back on that planet.