The TARDIS is as much a part of Christmas as turkey, mince pies, and mulled wine, and former "Doctor Who" showrunner Steven Moffat certainly knows his way around a festive adventure. This year's holiday offering,

Doctor Who Christmas special "Joy to the World" writer Steven Moffat and showrunner Russell T Davies dish on spoilers and script changes.

Filming that scene in the room that’s from millions of years ago was Coughlan’s favorite, she tells TV Insider. “It had a little bit of everything. You got that emotional moment and then you have the dinosaur and the escape, and I loved all of that,” she shares. “It’s such a fond memory.”

With verve, imagination and fun concepts, Steven Moffat's latest Who episode wraps up Christmas in a big sentimental bow. Spoilers ahead.

I was lucky enough to speak to RTD, as well as former showrunner and "Joy To The World" writer Steven Moffat, ahead of the special and talk about where Doctor Who goes from here.