What could inspire that level of fear?

Hello, you...

Have we met?

And how could Vincent have known about it? He won't even be born for centuries.

The stones! These stones are great big transmitters,

Even poor Vincent heard it in his dreams.

Doctor, everyone?

Anything that powerful, I'd know about it. Why don't I know?

Doctor, you said everyone could hear it. So who else is coming?

Oh.

Oh? Oh, what?

OK, should be feeding back to you now. River, what's out there? Getting anything?

Well, I died and turned into a Roman. It's very distracting!

Did she miss me?

Stay your weapons. Stand back.

- What is it? What's happening? - The final phase.

- You're surrounded. Have you got a plan? - Yes!

Now hurry up and get the TARDIS here. I need equipment!

They're all here, all of them, all for you.

What could you possibly be?