[ Despite having his own haunting, as it were, the Doctor isn't at all expecting to suddenly be interrupted by the ghost of Clara's mother.

Of all the times! Of course. It has to work out precisely like this, doesn't it. This world is predictable in its unpredictability at least; or its dreadful circumstances, in any case. Having met her mother — sort of — her face is instantly recognizable to him and the Doctor is trying to soothe Clara at the same time the dead will need to be dealt with, albeit silently. He holds Clara a bit closer, more protectively. ]

Oh, honestly, must we.

[ This is said under his breath, a mix of exasperation and worry. Sorry, Clara. He can imagine the feelings it evokes in her, but they have pressing matters now, with the dead at their door. ]

Is there a way to stop her? Has this happened before?

[ He might as well talk now, her mother's voice has already shattered the silence. ]

Blink or mumble something, anything at all.