Doctor Who executive producer, Steven Moffat has explained the decision to revamp the TARDIS.
A new version of the of the time travelling machine - designed by Michael Pickwoad - will make its first appearance in this years Christmas Special, The Snowmen.
Speaking at a screening of the episode on December 19th, he said: "I thought we'd been getting progressively whimsical with the interior of the TARDIS,"
"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."
The Snowmen will be broadcast at 5:15PM on BBC One and BBC One HD on Christmas Day.