Doctor Who 6x11: The God Complex

I just watched "The God Complex" and I am still thrumming with tension.
I've just added another phrase to the list of normally innocuous phrases from Doctor Who which will make me shudder. What's on the list?
"Are you my mummy?"
"Don't blink."
"Praise him."
I'm not sure whether to be angry about that or not.
( spoilers will praise him )

I can understand why some people loved it and some people didn't.
It was well-written, scary in a visceral way, full of tension, had some wonderfully powerful character moments... and disturbing undercurrents.