Steven Moffat said in DWM
“What’s the most dangerous place you put the Doctor, we wondered.
And then we put him there. Oh, it’s a proper blockbuster, this episode.
So many explosions that Peter Capaldi came in on his day off to watch
the Daleks blowing up.”
In SFX 251 Steven Moffat says:
“It’s actually quite a gritty Dalek
adventure. We go without question into the most dangerous place in the
universe – the last place The Doctor should be, and you will know that
by the end of the pre-titles…”
From Radio Times:
the worst thing in the universe, and then don’t bother because you’re
looking at right now. This is evil refined as engineering.”What’s the most dangerous place in the universe? Where is the last place
The Doctor should ever stand? He’s faced with his deadliest mission yet
– a journey into the heart of darkness, one even he’s scared to make.
the dying days of a bitter war, a beleaguered army has one last hope: a
Dalek so damaged it has become good. But can it be trusted? To find
out, a miniaturised team, led by The Doctor and Clara, embark on a
fantastic voyage into the Dalek itself…