Warning! The following contains SPOILERS for the Doctor Who Christmas Special "Joy To The World." Stream it with a Disney+ subscription and read at your own risk!

Doctor Who is back with high-energy, heartfelt festive special “Joy to the World”. Being a Steven Moffat joint, it’s full of wild and inventive concepts, from time travelling hotel rooms to psychic briefcases, via bootstrap paradoxes and sentient stars.

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.”