"I thought we'd been getting progressively whimsical with the interior of the TARDIS," Moffat said at a screening of the episode last night (December 19).
"I started to think, 'Well, why is that? It's not a magical place. It's actually a machine'. And actually potentially, as you'll see more spectacularly later, quite a scary place sometimes. We make a lot of use of that."
‘Doctor Who’ Steven Moffat on new TARDIS: ‘It’s quite a scary place’
Showrunner Moffat explains the decision to revamp the Doctor’s craft.
Daniel is the owner and Managing Editor of Time and The – !. He's been a fan of Doctor Who since watching Tom Baker regenerate into Peter Davison on his local PBS station as a kid. He launched Time and The – ! in 2011 after having the bright (?) idea to watch every Doctor Who story from the beginning and blog about it. (Yeah, he's way behind.)