[ Yes, a blessed thing sometimes, to forgo the video for audio — he'd done it once, with Clara, in order to spare her the pain of having to see him in his (thankfully) temporary monstrous form. ]

I don't know. [ It's the truth. And the shift in his tone of voice, from the excitable, whimsical Doctor, has gone a bit more serious; thoughtful. ] Suppose we're going to have to keep collecting them in order to find out. I've thought a lot about it, about these orbs. This station collecting them; the promises they've made to us.

This one glowed red. Not quite sure what that means.