Toby: There was some form of civilization... They buried something. And now its reaching out, calling.

Doctor: And you came.

Ida: How could we not?

Doctor: So, when it comes right down to it, why did you come here? Why did you do that? Why? I'll tell you why: because it was there! Brilliant! Excuse me, uh, Zack was it?

Zachary: That's me.

Doctor: Just stand there, 'cause I'm gonna hug you... Is that all right?

Zach: 'Spose so.

Doctor: Here we go. Coming in. (Doctor embraces Zach) Ah! Human beings! You are amazing! Ha! Thank you! (Releases Zach)

Zach: Not at all.

Doctor: But, apart from that, you're completely mad. You should get back in that ship and fly for your lives.